61415577156 has 12 divisors (see below), whose sum is σ = 143303013392. Its totient is φ = 20471859048.

The previous prime is 61415577137. The next prime is 61415577163. The reversal of 61415577156 is 65177551416.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2558982370 + ... + 2558982393.

Almost surely, 2^61415577156 is an apocalyptic number.

It is an amenable number.

61415577156 is an abundant number, since it is smaller than the sum of its proper divisors (81887436236).

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

61415577156 is a wasteful number, since it uses less digits than its factorization.

61415577156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117964770 (or 5117964768 counting only the distinct ones).

The product of its digits is 882000, while the sum is 48.

The spelling of 61415577156 in words is "sixty-one billion, four hundred fifteen million, five hundred seventy-seven thousand, one hundred fifty-six".