649515515610 has 32 divisors (see below), whose sum is σ = 1678747795200. Its totient is φ = 159880742208.

The previous prime is 649515515581. The next prime is 649515515639. The reversal of 649515515610 is 16515515946.

It is an interprime number because it is at equal distance from previous prime (649515515581) and next prime (649515515639).

It is a self number, because there is not a number n which added to its sum of digits gives 649515515610.

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, 832711810 + ... + 832712589.

It is an arithmetic number, because the mean of its divisors is an integer number (52460868600).

Almost surely, 2^649515515610 is an apocalyptic number.

649515515610 is an abundant number, since it is smaller than the sum of its proper divisors (1029232279590).

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

649515515610 is a wasteful number, since it uses less digits than its factorization.

649515515610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665424422.

The product of its (nonzero) digits is 810000, while the sum is 48.

The spelling of 649515515610 in words is "six hundred forty-nine billion, five hundred fifteen million, five hundred fifteen thousand, six hundred ten".