72900061171 has 12 divisors (see below), whose sum is σ = 87094217392. Its totient is φ = 59768991216.

The previous prime is 72900061159. The next prime is 72900061219. The reversal of 72900061171 is 17116000927.

It is not a de Polignac number, because 72900061171 - 2⁵ = 72900061139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72900061121) 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, 9839676 + ... + 9847081.

Almost surely, 2^72900061171 is an apocalyptic number.

72900061171 is a deficient number, since it is larger than the sum of its proper divisors (14194156221).

72900061171 is a wasteful number, since it uses less digits than its factorization.

72900061171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19686810 (or 19686787 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 34.

The spelling of 72900061171 in words is "seventy-two billion, nine hundred million, sixty-one thousand, one hundred seventy-one".