649736417695 has 16 divisors (see below), whose sum is σ = 819989176320. Its totient is φ = 493274716704.

The previous prime is 649736417689. The next prime is 649736417717. The reversal of 649736417695 is 596714637946.

It is a cyclic number.

It is not a de Polignac number, because 649736417695 - 2²⁹ = 649199546783 is a prime.

It is a super-2 number, since 2×649736417695² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649736417695.

It is a congruent number.

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, 22229025 + ... + 22258234.

It is an arithmetic number, because the mean of its divisors is an integer number (51249323520).

Almost surely, 2^649736417695 is an apocalyptic number.

649736417695 is a deficient number, since it is larger than the sum of its proper divisors (170252758625).

649736417695 is a wasteful number, since it uses less digits than its factorization.

649736417695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44487414.

The product of its digits is 205752960, while the sum is 67.

The spelling of 649736417695 in words is "six hundred forty-nine billion, seven hundred thirty-six million, four hundred seventeen thousand, six hundred ninety-five".