72154240878719 has 8 divisors (see below), whose sum is σ = 72896614176672. Its totient is φ = 71412672324960.

The previous prime is 72154240878701. The next prime is 72154240878799. The reversal of 72154240878719 is 91787804245127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72154240878719 - 2⁸ = 72154240878463 is a prime.

It is a super-2 number, since 2×72154240878719² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72154240878799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201005804 + ... + 201364449.

It is an arithmetic number, because the mean of its divisors is an integer number (9112076772084).

Almost surely, 2^{72154240878719} is an apocalyptic number.

72154240878719 is a deficient number, since it is larger than the sum of its proper divisors (742373297953).

72154240878719 is a wasteful number, since it uses less digits than its factorization.

72154240878719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402372097.

The product of its (nonzero) digits is 63221760, while the sum is 65.

The spelling of 72154240878719 in words is "seventy-two trillion, one hundred fifty-four billion, two hundred forty million, eight hundred seventy-eight thousand, seven hundred nineteen".