72155612116129 has 16 divisors (see below), whose sum is σ = 77267184071616. Its totient is φ = 67141829376000.

The previous prime is 72155612116103. The next prime is 72155612116177. The reversal of 72155612116129 is 92161121655127.

It is not a de Polignac number, because 72155612116129 - 2¹⁵ = 72155612083361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72155612116429) 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, 20930847 + ... + 24133204.

It is an arithmetic number, because the mean of its divisors is an integer number (4829199004476).

Almost surely, 2^{72155612116129} is an apocalyptic number.

It is an amenable number.

72155612116129 is a deficient number, since it is larger than the sum of its proper divisors (5111571955487).

72155612116129 is a wasteful number, since it uses less digits than its factorization.

72155612116129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45065136.

The product of its digits is 453600, while the sum is 49.

The spelling of 72155612116129 in words is "seventy-two trillion, one hundred fifty-five billion, six hundred twelve million, one hundred sixteen thousand, one hundred twenty-nine".