648044734431 has 16 divisors (see below), whose sum is σ = 880579140320. Its totient is φ = 423808053120.

The previous prime is 648044734427. The next prime is 648044734501. The reversal of 648044734431 is 134437440846.

It is not a de Polignac number, because 648044734431 - 2² = 648044734427 is a prime.

It is a super-2 number, since 2×648044734431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648044734231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4678696 + ... + 4815213.

It is an arithmetic number, because the mean of its divisors is an integer number (55036196270).

Almost surely, 2^648044734431 is an apocalyptic number.

648044734431 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

648044734431 is a deficient number, since it is larger than the sum of its proper divisors (232534405889).

648044734431 is a wasteful number, since it uses less digits than its factorization.

648044734431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494346.

The product of its (nonzero) digits is 3096576, while the sum is 48.

The spelling of 648044734431 in words is "six hundred forty-eight billion, forty-four million, seven hundred thirty-four thousand, four hundred thirty-one".