61356330816 has 56 divisors (see below), whose sum is σ = 177096688224. Its totient is φ = 18592826880.

The previous prime is 61356330803. The next prime is 61356330817. The reversal of 61356330816 is 61803365316.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61356330817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14523535 + ... + 14527758.

Almost surely, 2^61356330816 is an apocalyptic number.

61356330816 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

61356330816 is an abundant number, since it is smaller than the sum of its proper divisors (115740357408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61356330816 is a wasteful number, since it uses less digits than its factorization.

61356330816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29051319 (or 29051309 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 61356330816 in words is "sixty-one billion, three hundred fifty-six million, three hundred thirty thousand, eight hundred sixteen".