649631937319 has 8 divisors (see below), whose sum is σ = 656556017040. Its totient is φ = 642723649536.

The previous prime is 649631937301. The next prime is 649631937329. The reversal of 649631937319 is 913739136946.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 649631937319 - 2³⁷ = 512192983847 is a prime.

It is a super-2 number, since 2×649631937319² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649631937329) 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, 3865264 + ... + 4029829.

It is an arithmetic number, because the mean of its divisors is an integer number (82069502130).

Almost surely, 2^649631937319 is an apocalyptic number.

649631937319 is a deficient number, since it is larger than the sum of its proper divisors (6924079721).

649631937319 is a wasteful number, since it uses less digits than its factorization.

649631937319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895969.

The product of its digits is 19840464, while the sum is 61.

The spelling of 649631937319 in words is "six hundred forty-nine billion, six hundred thirty-one million, nine hundred thirty-seven thousand, three hundred nineteen".