78154624462664 has 16 divisors (see below), whose sum is σ = 146741488857600. Its totient is φ = 39023560767312.

The previous prime is 78154624462661. The next prime is 78154624462669. The reversal of 78154624462664 is 46626442645187.

78154624462664 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×78154624462664² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78154624462664.

It is not an unprimeable number, because it can be changed into a prime (78154624462661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6718926824 + ... + 6718938455.

It is an arithmetic number, because the mean of its divisors is an integer number (9171343053600).

Almost surely, 2^{78154624462664} is an apocalyptic number.

It is an amenable number.

78154624462664 is a deficient number, since it is larger than the sum of its proper divisors (68586864394936).

78154624462664 is a wasteful number, since it uses less digits than its factorization.

78154624462664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13437866012 (or 13437866008 counting only the distinct ones).

The product of its digits is 371589120, while the sum is 65.

The spelling of 78154624462664 in words is "seventy-eight trillion, one hundred fifty-four billion, six hundred twenty-four million, four hundred sixty-two thousand, six hundred sixty-four".