647442244746 has 32 divisors (see below), whose sum is σ = 1569556958400. Its totient is φ = 196194619440.

The previous prime is 647442244711. The next prime is 647442244769.

647442244746 is a `hidden beast` number, since 64 + 74 + 42 + 2 + 4 + 474 + 6 = 666.

647442244746 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 647442244692 and 647442244701.

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, 544984461 + ... + 544985648.

It is an arithmetic number, because the mean of its divisors is an integer number (49048654950).

Almost surely, 2^647442244746 is an apocalyptic number.

647442244746 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

647442244746 is an abundant number, since it is smaller than the sum of its proper divisors (922114713654).

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

647442244746 is a wasteful number, since it uses less digits than its factorization.

647442244746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089970131 (or 1089970125 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 54.

The spelling of 647442244746 in words is "six hundred forty-seven billion, four hundred forty-two million, two hundred forty-four thousand, seven hundred forty-six".