648999899051 has 12 divisors (see below), whose sum is σ = 767754986040. Its totient is φ = 546857055360.

The previous prime is 648999899017. The next prime is 648999899057. The reversal of 648999899051 is 150998999846.

It is a de Polignac number, because none of the positive numbers 2^k-648999899051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648999899057) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112241990 + ... + 112247771.

It is an arithmetic number, because the mean of its divisors is an integer number (63979582170).

Almost surely, 2^648999899051 is an apocalyptic number.

648999899051 is a deficient number, since it is larger than the sum of its proper divisors (118755086989).

648999899051 is a wasteful number, since it uses less digits than its factorization.

648999899051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224489834 (or 224489827 counting only the distinct ones).

The product of its (nonzero) digits is 453496320, while the sum is 77.

The spelling of 648999899051 in words is "six hundred forty-eight billion, nine hundred ninety-nine million, eight hundred ninety-nine thousand, fifty-one".