61181264 has 20 divisors (see below), whose sum is σ = 119629620. Its totient is φ = 30309120.

The previous prime is 61181221. The next prime is 61181293. The reversal of 61181264 is 46218116.

It can be written as a sum of positive squares in 2 ways, for example, as 48163600 + 13017664 = 6940^2 + 3608^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct 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, 15797 + ... + 19284.

It is an arithmetic number, because the mean of its divisors is an integer number (5981481).

Almost surely, 2^61181264 is an apocalyptic number.

It is an amenable number.

61181264 is a deficient number, since it is larger than the sum of its proper divisors (58448356).

61181264 is a wasteful number, since it uses less digits than its factorization.

61181264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35198 (or 35192 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 61181264 is about 7821.8453065757. The cubic root of 61181264 is about 394.0392481537.

The spelling of 61181264 in words is "sixty-one million, one hundred eighty-one thousand, two hundred sixty-four".