64553730 has 16 divisors (see below), whose sum is σ = 154929024. Its totient is φ = 17214320.

The previous prime is 64553711. The next prime is 64553737. The reversal of 64553730 is 3735546.

It is a junction number, because it is equal to n+sod(n) for n = 64553691 and 64553700.

It is not an unprimeable number, because it can be changed into a prime (64553737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1075866 + ... + 1075925.

It is an arithmetic number, because the mean of its divisors is an integer number (9683064).

Almost surely, 2^64553730 is an apocalyptic number.

64553730 is an abundant number, since it is smaller than the sum of its proper divisors (90375294).

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

64553730 is a wasteful number, since it uses less digits than its factorization.

64553730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151801.

The product of its (nonzero) digits is 37800, while the sum is 33.

The square root of 64553730 is about 8034.5335894500. The cubic root of 64553730 is about 401.1502930604.

The spelling of 64553730 in words is "sixty-four million, five hundred fifty-three thousand, seven hundred thirty".