72212501561438 has 24 divisors (see below), whose sum is σ = 126003899439000. Its totient is φ = 30948103731888.

The previous prime is 72212501561437. The next prime is 72212501561527. The reversal of 72212501561438 is 83416510521227.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72212501561392 and 72212501561401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72212501561437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29796893 + ... + 32129111.

It is an arithmetic number, because the mean of its divisors is an integer number (5250162476625).

Almost surely, 2^{72212501561438} is an apocalyptic number.

72212501561438 is a deficient number, since it is larger than the sum of its proper divisors (53791397877562).

72212501561438 is a wasteful number, since it uses less digits than its factorization.

72212501561438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648184 (or 2648177 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 72212501561438 in words is "seventy-two trillion, two hundred twelve billion, five hundred one million, five hundred sixty-one thousand, four hundred thirty-eight".