72120254562 has 12 divisors (see below), whose sum is σ = 156260551590. Its totient is φ = 24040084848.

The previous prime is 72120254561. The next prime is 72120254573. The reversal of 72120254562 is 26545202127.

72120254562 is a `hidden beast` number, since 7 + 21 + 20 + 2 + 54 + 562 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38568639321 + 33551615241 = 196389^2 + 183171^2 .

It is a super-2 number, since 2×72120254562² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72120254561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2003340387 + ... + 2003340422.

Almost surely, 2^72120254562 is an apocalyptic number.

72120254562 is an abundant number, since it is smaller than the sum of its proper divisors (84140297028).

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

72120254562 is a wasteful number, since it uses less digits than its factorization.

72120254562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006680817 (or 4006680814 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

Adding to 72120254562 its reverse (26545202127), we get a palindrome (98665456689).

The spelling of 72120254562 in words is "seventy-two billion, one hundred twenty million, two hundred fifty-four thousand, five hundred sixty-two".