648863992895 has 16 divisors (see below), whose sum is σ = 804102647040. Its totient is φ = 502128480000.

The previous prime is 648863992879. The next prime is 648863992967. The reversal of 648863992895 is 598299368846.

It is not a de Polignac number, because 648863992895 - 2⁴ = 648863992879 is a prime.

It is a super-2 number, since 2×648863992895² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 548606 + ... + 1264395.

It is an arithmetic number, because the mean of its divisors is an integer number (50256415440).

Almost surely, 2^648863992895 is an apocalyptic number.

648863992895 is a deficient number, since it is larger than the sum of its proper divisors (155238654145).

648863992895 is a wasteful number, since it uses less digits than its factorization.

648863992895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815346.

The product of its digits is 1612431360, while the sum is 77.

The spelling of 648863992895 in words is "six hundred forty-eight billion, eight hundred sixty-three million, nine hundred ninety-two thousand, eight hundred ninety-five".