61511056 has 20 divisors (see below), whose sum is σ = 125450800. Its totient is φ = 29136672.

The previous prime is 61511033. The next prime is 61511071. The reversal of 61511056 is 65011516.

It is a super-2 number, since 2×61511056² = 7567220020470272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61511056.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100866 + ... + 101473.

It is an arithmetic number, because the mean of its divisors is an integer number (6272540).

Almost surely, 2^61511056 is an apocalyptic number.

It is an amenable number.

61511056 is an abundant number, since it is smaller than the sum of its proper divisors (63939744).

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

61511056 is a wasteful number, since it uses less digits than its factorization.

61511056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202366 (or 202360 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61511056 is about 7842.8984438153. The cubic root of 61511056 is about 394.7459906196.

The spelling of 61511056 in words is "sixty-one million, five hundred eleven thousand, fifty-six".