649376901 has 24 divisors (see below), whose sum is σ = 969905664. Its totient is φ = 418386240.

The previous prime is 649376891. The next prime is 649376921. The reversal of 649376901 is 109673946.

649376901 is a `hidden beast` number, since 6 + 493 + 76 + 90 + 1 = 666.

It is not a de Polignac number, because 649376901 - 2⁵ = 649376869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649376921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31260 + ... + 47706.

It is an arithmetic number, because the mean of its divisors is an integer number (40412736).

Almost surely, 2^649376901 is an apocalyptic number.

It is an amenable number.

649376901 is a deficient number, since it is larger than the sum of its proper divisors (320528763).

649376901 is a wasteful number, since it uses less digits than its factorization.

649376901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16601 (or 16598 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 649376901 is about 25482.8746612308. The cubic root of 649376901 is about 865.9622205800.

The spelling of 649376901 in words is "six hundred forty-nine million, three hundred seventy-six thousand, nine hundred one".