672540726466535 has 16 divisors (see below), whose sum is σ = 812872588674720. Its totient is φ = 534150270944640.

The previous prime is 672540726466513. The next prime is 672540726466577. The reversal of 672540726466535 is 535664627045276.

It is not a de Polignac number, because 672540726466535 - 2²⁴ = 672540709689319 is a prime.

It is a super-2 number, since 2×672540726466535² (a number of 30 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, 21692429 + ... + 42610361.

It is an arithmetic number, because the mean of its divisors is an integer number (50804536792170).

Almost surely, 2^{672540726466535} is an apocalyptic number.

672540726466535 is a deficient number, since it is larger than the sum of its proper divisors (140331862208185).

672540726466535 is a wasteful number, since it uses less digits than its factorization.

672540726466535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20964338.

The product of its (nonzero) digits is 1524096000, while the sum is 68.

The spelling of 672540726466535 in words is "six hundred seventy-two trillion, five hundred forty billion, seven hundred twenty-six million, four hundred sixty-six thousand, five hundred thirty-five".