649045158 has 16 divisors (see below), whose sum is σ = 1298910576. Its totient is φ = 216211680.

The previous prime is 649045153. The next prime is 649045169. The reversal of 649045158 is 851540946.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649045153) 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, 23641 + ... + 43092.

It is an arithmetic number, because the mean of its divisors is an integer number (81181911).

Almost surely, 2^649045158 is an apocalyptic number.

649045158 is an abundant number, since it is smaller than the sum of its proper divisors (649865418).

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

649045158 is a wasteful number, since it uses less digits than its factorization.

649045158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68359.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 649045158 is about 25476.3646935743. The cubic root of 649045158 is about 865.8147326121.

The spelling of 649045158 in words is "six hundred forty-nine million, forty-five thousand, one hundred fifty-eight".