72187478127 has 8 divisors (see below), whose sum is σ = 106944412080. Its totient is φ = 48124985400.

The previous prime is 72187478101. The next prime is 72187478171.

72187478127 is a `hidden beast` number, since 72 + 1 + 87 + 478 + 1 + 27 = 666.

72187478127 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 72187478127 - 2²⁶ = 72120369263 is a prime.

It is a super-2 number, since 2×72187478127² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72187478197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1336805124 + ... + 1336805177.

It is an arithmetic number, because the mean of its divisors is an integer number (13368051510).

Almost surely, 2^72187478127 is an apocalyptic number.

72187478127 is a deficient number, since it is larger than the sum of its proper divisors (34756933953).

72187478127 is a wasteful number, since it uses less digits than its factorization.

72187478127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2673610310 (or 2673610304 counting only the distinct ones).

The product of its digits is 2458624, while the sum is 54.

The spelling of 72187478127 in words is "seventy-two billion, one hundred eighty-seven million, four hundred seventy-eight thousand, one hundred twenty-seven".