645538362 has 32 divisors (see below), whose sum is σ = 1483259904. Its totient is φ = 183471600.

The previous prime is 645538349. The next prime is 645538381. The reversal of 645538362 is 263835546.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32214 + ... + 48257.

It is an arithmetic number, because the mean of its divisors is an integer number (46351872).

Almost surely, 2^645538362 is an apocalyptic number.

645538362 is an abundant number, since it is smaller than the sum of its proper divisors (837721542).

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

645538362 is a wasteful number, since it uses less digits than its factorization.

645538362 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80674.

The product of its digits is 518400, while the sum is 42.

The square root of 645538362 is about 25407.4469791831. The cubic root of 645538362 is about 864.2525812245.

The spelling of 645538362 in words is "six hundred forty-five million, five hundred thirty-eight thousand, three hundred sixty-two".