649590547938 has 16 divisors (see below), whose sum is σ = 1301279941920. Its totient is φ = 216180374976.

The previous prime is 649590547909. The next prime is 649590547967. The reversal of 649590547938 is 839745095946.

It is an interprime number because it is at equal distance from previous prime (649590547909) and next prime (649590547967).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87447895 + ... + 87455322.

It is an arithmetic number, because the mean of its divisors is an integer number (81329996370).

Almost surely, 2^649590547938 is an apocalyptic number.

649590547938 is an abundant number, since it is smaller than the sum of its proper divisors (651689393982).

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

649590547938 is a wasteful number, since it uses less digits than its factorization.

649590547938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174903841.

The product of its (nonzero) digits is 293932800, while the sum is 69.

The spelling of 649590547938 in words is "six hundred forty-nine billion, five hundred ninety million, five hundred forty-seven thousand, nine hundred thirty-eight".