649523563776 has 72 divisors (see below), whose sum is σ = 1920755466560. Its totient is φ = 216507852288.

The previous prime is 649523563727. The next prime is 649523563811. The reversal of 649523563776 is 677365325946.

649523563776 is a `hidden beast` number, since 6 + 4 + 9 + 523 + 5 + 6 + 37 + 76 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

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, 46978300 + ... + 46992123.

Almost surely, 2^649523563776 is an apocalyptic number.

It is an amenable number.

649523563776 is an abundant number, since it is smaller than the sum of its proper divisors (1271231902784).

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

649523563776 is an equidigital number, since it uses as much as digits as its factorization.

649523563776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93970448 (or 93970428 counting only the distinct ones).

The product of its digits is 171460800, while the sum is 63.

The spelling of 649523563776 in words is "six hundred forty-nine billion, five hundred twenty-three million, five hundred sixty-three thousand, seven hundred seventy-six".