61268578008 has 64 divisors (see below), whose sum is σ = 167166443520. Its totient is φ = 18558422400.

The previous prime is 61268577977. The next prime is 61268578013. The reversal of 61268578008 is 80087586216.

61268578008 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61268578008² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595753 + ... + 690983.

It is an arithmetic number, because the mean of its divisors is an integer number (2611975680).

Almost surely, 2^61268578008 is an apocalyptic number.

It is an amenable number.

61268578008 is an abundant number, since it is smaller than the sum of its proper divisors (105897865512).

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

61268578008 is a wasteful number, since it uses less digits than its factorization.

61268578008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97688 (or 97684 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 61268578008 in words is "sixty-one billion, two hundred sixty-eight million, five hundred seventy-eight thousand, eight".