72169812455 has 16 divisors (see below), whose sum is σ = 93469724544. Its totient is φ = 53177990400.

The previous prime is 72169812431. The next prime is 72169812457. The reversal of 72169812455 is 55421896127.

It is not a de Polignac number, because 72169812455 - 2²⁶ = 72102703591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72169812457) 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, 1185071 + ... + 1244480.

It is an arithmetic number, because the mean of its divisors is an integer number (5841857784).

Almost surely, 2^72169812455 is an apocalyptic number.

72169812455 is a deficient number, since it is larger than the sum of its proper divisors (21299912089).

72169812455 is a wasteful number, since it uses less digits than its factorization.

72169812455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2430026.

The product of its digits is 1209600, while the sum is 50.

The spelling of 72169812455 in words is "seventy-two billion, one hundred sixty-nine million, eight hundred twelve thousand, four hundred fifty-five".