72402001515 has 24 divisors (see below), whose sum is σ = 126906886080. Its totient is φ = 38180529024.

The previous prime is 72402001513. The next prime is 72402001549. The reversal of 72402001515 is 51510020427.

It is not a de Polignac number, because 72402001515 - 2¹ = 72402001513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72402001513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9034947 + ... + 9042956.

It is an arithmetic number, because the mean of its divisors is an integer number (5287786920).

Almost surely, 2^72402001515 is an apocalyptic number.

72402001515 is a deficient number, since it is larger than the sum of its proper divisors (54504884565).

72402001515 is a wasteful number, since it uses less digits than its factorization.

72402001515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18078003 (or 18078000 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The spelling of 72402001515 in words is "seventy-two billion, four hundred two million, one thousand, five hundred fifteen".