61650513 has 6 divisors (see below), whose sum is σ = 89050754. Its totient is φ = 41100336.

The previous prime is 61650467. The next prime is 61650521. The reversal of 61650513 is 31505616.

It is a happy number.

61650513 is a `hidden beast` number, since 6 + 1 + 650 + 5 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 34433424 + 27217089 = 5868^2 + 5217^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61650513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61650553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3425020 + ... + 3425037.

Almost surely, 2^61650513 is an apocalyptic number.

It is an amenable number.

61650513 is a deficient number, since it is larger than the sum of its proper divisors (27400241).

61650513 is a wasteful number, since it uses less digits than its factorization.

61650513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6850063 (or 6850060 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 61650513 is about 7851.7840647843. The cubic root of 61650513 is about 395.0440863040.

The spelling of 61650513 in words is "sixty-one million, six hundred fifty thousand, five hundred thirteen".