72372157773 has 4 divisors (see below), whose sum is σ = 96496210368. Its totient is φ = 48248105180.

The previous prime is 72372157771. The next prime is 72372157789. The reversal of 72372157773 is 37775127327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72372157773 - 2¹ = 72372157771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72372157771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12062026293 + ... + 12062026298.

It is an arithmetic number, because the mean of its divisors is an integer number (24124052592).

Almost surely, 2^72372157773 is an apocalyptic number.

It is an amenable number.

72372157773 is a deficient number, since it is larger than the sum of its proper divisors (24124052595).

72372157773 is a wasteful number, since it uses less digits than its factorization.

72372157773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24124052594.

The product of its digits is 3025260, while the sum is 51.

The spelling of 72372157773 in words is "seventy-two billion, three hundred seventy-two million, one hundred fifty-seven thousand, seven hundred seventy-three".