61551161051512 has 32 divisors (see below), whose sum is σ = 126091149465600. Its totient is φ = 27935345519200.

The previous prime is 61551161051507. The next prime is 61551161051587. The reversal of 61551161051512 is 21515016115516.

It is a super-2 number, since 2×61551161051512² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530628664 + ... + 530744647.

It is an arithmetic number, because the mean of its divisors is an integer number (3940348420800).

Almost surely, 2^{61551161051512} is an apocalyptic number.

It is an amenable number.

61551161051512 is an abundant number, since it is smaller than the sum of its proper divisors (64539988414088).

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

61551161051512 is a wasteful number, since it uses less digits than its factorization.

61551161051512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061373987 (or 1061373983 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 40.

The spelling of 61551161051512 in words is "sixty-one trillion, five hundred fifty-one billion, one hundred sixty-one million, fifty-one thousand, five hundred twelve".