72136655344 has 20 divisors (see below), whose sum is σ = 150515906296. Its totient is φ = 33293840832.

The previous prime is 72136655333. The next prime is 72136655347. The reversal of 72136655344 is 44355663127.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72136655294 and 72136655303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72136655347) 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, 173405214 + ... + 173405629.

Almost surely, 2^72136655344 is an apocalyptic number.

It is an amenable number.

72136655344 is an abundant number, since it is smaller than the sum of its proper divisors (78379250952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72136655344 is a wasteful number, since it uses less digits than its factorization.

72136655344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346810864 (or 346810858 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 46.

The spelling of 72136655344 in words is "seventy-two billion, one hundred thirty-six million, six hundred fifty-five thousand, three hundred forty-four".