64513650 has 24 divisors (see below), whose sum is σ = 159994224. Its totient is φ = 17203600.

The previous prime is 64513639. The next prime is 64513663. The reversal of 64513650 is 5631546.

It is a super-2 number, since 2×64513650² = 8324022072645000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 214896 + ... + 215195.

It is an arithmetic number, because the mean of its divisors is an integer number (6666426).

Almost surely, 2^64513650 is an apocalyptic number.

64513650 is an abundant number, since it is smaller than the sum of its proper divisors (95480574).

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

64513650 is a wasteful number, since it uses less digits than its factorization.

64513650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430106 (or 430101 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 64513650 is about 8032.0389690290. The cubic root of 64513650 is about 401.0672540560.

It can be divided in two parts, 6451 and 3650, that added together give a palindrome (10101).

The spelling of 64513650 in words is "sixty-four million, five hundred thirteen thousand, six hundred fifty".