72194992533 has 6 divisors (see below), whose sum is σ = 104281655894. Its totient is φ = 48129995016.

The previous prime is 72194992517. The next prime is 72194992547. The reversal of 72194992533 is 33529949127.

72194992533 is a `hidden beast` number, since 7 + 2 + 19 + 4 + 9 + 92 + 533 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70576298244 + 1618694289 = 265662^2 + 40233^2 .

It is not a de Polignac number, because 72194992533 - 2⁴ = 72194992517 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72194992533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72194982533) 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, 4010832910 + ... + 4010832927.

Almost surely, 2^72194992533 is an apocalyptic number.

It is an amenable number.

72194992533 is a deficient number, since it is larger than the sum of its proper divisors (32086663361).

72194992533 is a wasteful number, since it uses less digits than its factorization.

72194992533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8021665843 (or 8021665840 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 54.

The spelling of 72194992533 in words is "seventy-two billion, one hundred ninety-four million, nine hundred ninety-two thousand, five hundred thirty-three".