61641512 has 16 divisors (see below), whose sum is σ = 116723700. Its totient is φ = 30515200.

The previous prime is 61641499. The next prime is 61641521. The reversal of 61641512 is 21514616.

It can be written as a sum of positive squares in 2 ways, for example, as 61559716 + 81796 = 7846^2 + 286^2 .

It is a super-2 number, since 2×61641512² = 7599352003292288, which contains 22 as substring.

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, 37337 + ... + 38952.

Almost surely, 2^61641512 is an apocalyptic number.

It is an amenable number.

61641512 is a deficient number, since it is larger than the sum of its proper divisors (55082188).

61641512 is a wasteful number, since it uses less digits than its factorization.

61641512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76396 (or 76392 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 61641512 is about 7851.2108620263. The cubic root of 61641512 is about 395.0248598358.

The spelling of 61641512 in words is "sixty-one million, six hundred forty-one thousand, five hundred twelve".