72121246889546 has 16 divisors (see below), whose sum is σ = 112886670772800. Its totient is φ = 34492391100288.

The previous prime is 72121246889539. The next prime is 72121246889563. The reversal of 72121246889546 is 64598864212127.

It is a super-4 number, since 4×72121246889546⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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, 4364231 + ... + 12778458.

It is an arithmetic number, because the mean of its divisors is an integer number (7055416923300).

Almost surely, 2^{72121246889546} is an apocalyptic number.

72121246889546 is a deficient number, since it is larger than the sum of its proper divisors (40765423883254).

72121246889546 is a wasteful number, since it uses less digits than its factorization.

72121246889546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17234173.

The product of its digits is 92897280, while the sum is 65.

The spelling of 72121246889546 in words is "seventy-two trillion, one hundred twenty-one billion, two hundred forty-six million, eight hundred eighty-nine thousand, five hundred forty-six".