615664012 has 6 divisors (see below), whose sum is σ = 1077412028. Its totient is φ = 307832004.

The previous prime is 615664009. The next prime is 615664013. The reversal of 615664012 is 210466516.

It is a super-2 number, since 2×615664012² = 758084351343872288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (615664013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76957998 + ... + 76958005.

Almost surely, 2^615664012 is an apocalyptic number.

It is an amenable number.

615664012 is a deficient number, since it is larger than the sum of its proper divisors (461748016).

615664012 is a wasteful number, since it uses less digits than its factorization.

615664012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153916007 (or 153916005 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 615664012 is about 24812.5776976113. The cubic root of 615664012 is about 850.7094478369.

The spelling of 615664012 in words is "six hundred fifteen million, six hundred sixty-four thousand, twelve".