648747747846 has 24 divisors (see below), whose sum is σ = 1533403768104. Its totient is φ = 196590226560.

The previous prime is 648747747821. The next prime is 648747747853.

648747747846 is a `hidden beast` number, since 6 + 4 + 87 + 4 + 77 + 478 + 4 + 6 = 666.

648747747846 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1638251691 + ... + 1638252086.

It is an arithmetic number, because the mean of its divisors is an integer number (63891823671).

Almost surely, 2^648747747846 is an apocalyptic number.

648747747846 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

648747747846 is an abundant number, since it is smaller than the sum of its proper divisors (884656020258).

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

648747747846 is a wasteful number, since it uses less digits than its factorization.

648747747846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3276503796 (or 3276503793 counting only the distinct ones).

The product of its digits is 1416167424, while the sum is 72.

The spelling of 648747747846 in words is "six hundred forty-eight billion, seven hundred forty-seven million, seven hundred forty-seven thousand, eight hundred forty-six".