77487081007 has 8 divisors (see below), whose sum is σ = 88572719232. Its totient is φ = 66405456600.

The previous prime is 77487080981. The next prime is 77487081011. The reversal of 77487081007 is 70018078477.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-77487081007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77487081017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961969 + ... + 1039402.

It is an arithmetic number, because the mean of its divisors is an integer number (11071589904).

Almost surely, 2^77487081007 is an apocalyptic number.

77487081007 is a deficient number, since it is larger than the sum of its proper divisors (11085638225).

77487081007 is a wasteful number, since it uses less digits than its factorization.

77487081007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2006909.

The product of its (nonzero) digits is 614656, while the sum is 49.

The spelling of 77487081007 in words is "seventy-seven billion, four hundred eighty-seven million, eighty-one thousand, seven".