72154165503 has 16 divisors (see below), whose sum is σ = 109955678976. Its totient is φ = 41228523840.

The previous prime is 72154165477. The next prime is 72154165511. The reversal of 72154165503 is 30556145127.

It is not a de Polignac number, because 72154165503 - 2¹⁶ = 72154099967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72154165703) 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, 301168 + ... + 484778.

It is an arithmetic number, because the mean of its divisors is an integer number (6872229936).

Almost surely, 2^72154165503 is an apocalyptic number.

72154165503 is a deficient number, since it is larger than the sum of its proper divisors (37801513473).

72154165503 is a wasteful number, since it uses less digits than its factorization.

72154165503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202334.

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 72154165503 in words is "seventy-two billion, one hundred fifty-four million, one hundred sixty-five thousand, five hundred three".