672644351465736 has 128 divisors (see below), whose sum is σ = 1853137589022720. Its totient is φ = 202148126256384.

The previous prime is 672644351465731. The next prime is 672644351465767. The reversal of 672644351465736 is 637564153446276.

It is not an unprimeable number, because it can be changed into a prime (672644351465731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448727995 + ... + 450224501.

It is an arithmetic number, because the mean of its divisors is an integer number (14477637414240).

Almost surely, 2^{672644351465736} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672644351465736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926568794511360).

672644351465736 is an abundant number, since it is smaller than the sum of its proper divisors (1180493237556984).

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

672644351465736 is a wasteful number, since it uses less digits than its factorization.

672644351465736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530075 (or 1530071 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 69.

The spelling of 672644351465736 in words is "six hundred seventy-two trillion, six hundred forty-four billion, three hundred fifty-one million, four hundred sixty-five thousand, seven hundred thirty-six".