649634122998 has 40 divisors (see below), whose sum is σ = 1663613312592. Its totient is φ = 185609749104.

The previous prime is 649634122979. The next prime is 649634123009. The reversal of 649634122998 is 899221436946.

649634122998 is a `hidden beast` number, since 6 + 496 + 34 + 1 + 2 + 29 + 98 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 286433665 + ... + 286435932.

Almost surely, 2^649634122998 is an apocalyptic number.

649634122998 is an abundant number, since it is smaller than the sum of its proper divisors (1013979189594).

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

649634122998 is a wasteful number, since it uses less digits than its factorization.

649634122998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572869618 (or 572869609 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 63.

The spelling of 649634122998 in words is "six hundred forty-nine billion, six hundred thirty-four million, one hundred twenty-two thousand, nine hundred ninety-eight".