72541009778426 has 16 divisors (see below), whose sum is σ = 124386897420096. Its totient is φ = 31081284026496.

The previous prime is 72541009778351. The next prime is 72541009778473. The reversal of 72541009778426 is 62487790014527.

72541009778426 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×72541009778426³ (a number of 43 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 643288631 + ... + 643401386.

It is an arithmetic number, because the mean of its divisors is an integer number (7774181088756).

Almost surely, 2^{72541009778426} is an apocalyptic number.

72541009778426 is a deficient number, since it is larger than the sum of its proper divisors (51845887641670).

72541009778426 is a wasteful number, since it uses less digits than its factorization.

72541009778426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286694053.

The product of its (nonzero) digits is 47416320, while the sum is 62.

The spelling of 72541009778426 in words is "seventy-two trillion, five hundred forty-one billion, nine million, seven hundred seventy-eight thousand, four hundred twenty-six".