39472185381 has 4 divisors (see below), whose sum is σ = 52629580512. Its totient is φ = 26314790252.

The previous prime is 39472185373. The next prime is 39472185391. The reversal of 39472185381 is 18358127493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39472185381 - 2³ = 39472185373 is a prime.

It is a super-2 number, since 2×39472185381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39472185371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6578697561 + ... + 6578697566.

It is an arithmetic number, because the mean of its divisors is an integer number (13157395128).

Almost surely, 2^39472185381 is an apocalyptic number.

It is an amenable number.

39472185381 is a deficient number, since it is larger than the sum of its proper divisors (13157395131).

39472185381 is a wasteful number, since it uses less digits than its factorization.

39472185381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13157395130.

The product of its digits is 1451520, while the sum is 51.

The spelling of 39472185381 in words is "thirty-nine billion, four hundred seventy-two million, one hundred eighty-five thousand, three hundred eighty-one".