72181296290123 has 16 divisors (see below), whose sum is σ = 78034900608000. Its totient is φ = 66533201377632.

The previous prime is 72181296290119. The next prime is 72181296290137. The reversal of 72181296290123 is 32109269218127.

It is not a de Polignac number, because 72181296290123 - 2² = 72181296290119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72181296290153) 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, 53762438 + ... + 55088676.

It is an arithmetic number, because the mean of its divisors is an integer number (4877181288000).

Almost surely, 2^{72181296290123} is an apocalyptic number.

72181296290123 is a deficient number, since it is larger than the sum of its proper divisors (5853604317877).

72181296290123 is a wasteful number, since it uses less digits than its factorization.

72181296290123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403714.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The spelling of 72181296290123 in words is "seventy-two trillion, one hundred eighty-one billion, two hundred ninety-six million, two hundred ninety thousand, one hundred twenty-three".