64536630 has 16 divisors (see below), whose sum is σ = 154887984. Its totient is φ = 17209760.

The previous prime is 64536623. The next prime is 64536653. The reversal of 64536630 is 3663546.

It is a happy number.

It is a super-2 number, since 2×64536630² = 8329953223513800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64536591 and 64536600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075581 + ... + 1075640.

It is an arithmetic number, because the mean of its divisors is an integer number (9680499).

Almost surely, 2^64536630 is an apocalyptic number.

64536630 is an abundant number, since it is smaller than the sum of its proper divisors (90351354).

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

64536630 is a wasteful number, since it uses less digits than its factorization.

64536630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151231.

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 64536630 is about 8033.4693626104. The cubic root of 64536630 is about 401.1148689478.

The spelling of 64536630 in words is "sixty-four million, five hundred thirty-six thousand, six hundred thirty".