61611136 has 32 divisors (see below), whose sum is σ = 126708480. Its totient is φ = 29809920.

The previous prime is 61611127. The next prime is 61611139. The reversal of 61611136 is 63111616.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 61611136.

It is not an unprimeable number, because it can be changed into a prime (61611139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796 + ... + 11731.

It is an arithmetic number, because the mean of its divisors is an integer number (3959640).

Almost surely, 2^61611136 is an apocalyptic number.

It is an amenable number.

61611136 is an abundant number, since it is smaller than the sum of its proper divisors (65097344).

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

61611136 is a wasteful number, since it uses less digits than its factorization.

61611136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15572 (or 15560 counting only the distinct ones).

The product of its digits is 648, while the sum is 25.

The square root of 61611136 is about 7849.2761449703. The cubic root of 61611136 is about 394.9599617592.

The spelling of 61611136 in words is "sixty-one million, six hundred eleven thousand, one hundred thirty-six".