61156688 has 20 divisors (see below), whose sum is σ = 118656468. Its totient is φ = 30535680.

The previous prime is 61156643. The next prime is 61156703. The reversal of 61156688 is 88665116.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23309584 + 37847104 = 4828^2 + 6152^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 11408 + ... + 15888.

Almost surely, 2^61156688 is an apocalyptic number.

It is an amenable number.

61156688 is a deficient number, since it is larger than the sum of its proper divisors (57499780).

61156688 is a wasteful number, since it uses less digits than its factorization.

61156688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5342 (or 5336 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 61156688 is about 7820.2741639920. The cubic root of 61156688 is about 393.9864803352.

The spelling of 61156688 in words is "sixty-one million, one hundred fifty-six thousand, six hundred eighty-eight".