38721491469 has 12 divisors (see below), whose sum is σ = 56444173500. Its totient is φ = 25577498304.

The previous prime is 38721491363. The next prime is 38721491477. The reversal of 38721491469 is 96419412783.

38721491469 is a `hidden beast` number, since 3 + 87 + 2 + 14 + 91 + 469 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12989160900 + 25732330569 = 113970^2 + 160413^2 .

It is not a de Polignac number, because 38721491469 - 2¹¹ = 38721489421 is a prime.

It is a super-2 number, since 2×38721491469² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38721490469) 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, 19734744 + ... + 19736705.

It is an arithmetic number, because the mean of its divisors is an integer number (4703681125).

Almost surely, 2^38721491469 is an apocalyptic number.

It is an amenable number.

38721491469 is a deficient number, since it is larger than the sum of its proper divisors (17722682031).

38721491469 is a wasteful number, since it uses less digits than its factorization.

38721491469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39471564 (or 39471561 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 38721491469 in words is "thirty-eight billion, seven hundred twenty-one million, four hundred ninety-one thousand, four hundred sixty-nine".