649647746946 has 24 divisors (see below), whose sum is σ = 1535531038704. Its totient is φ = 196862953560.

The previous prime is 649647746929. The next prime is 649647746971.

649647746946 is a `hidden beast` number, since 6 + 4 + 96 + 4 + 77 + 469 + 4 + 6 = 666.

649647746946 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×649647746946² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1640524416 + ... + 1640524811.

It is an arithmetic number, because the mean of its divisors is an integer number (63980459946).

Almost surely, 2^649647746946 is an apocalyptic number.

649647746946 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

649647746946 is an abundant number, since it is smaller than the sum of its proper divisors (885883291758).

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

649647746946 is a wasteful number, since it uses less digits than its factorization.

649647746946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3281049246 (or 3281049243 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 72.

The spelling of 649647746946 in words is "six hundred forty-nine billion, six hundred forty-seven million, seven hundred forty-six thousand, nine hundred forty-six".