139728369474 has 24 divisors (see below), whose sum is σ = 303110025660. Its totient is φ = 46519934688.

The previous prime is 139728369439. The next prime is 139728369479. The reversal of 139728369474 is 474963827931.

139728369474 is a `hidden beast` number, since 1 + 39 + 72 + 8 + 3 + 69 + 474 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138091762449 + 1636607025 = 371607^2 + 40455^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139728369479) 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, 4667037 + ... + 4696880.

Almost surely, 2^139728369474 is an apocalyptic number.

139728369474 is an abundant number, since it is smaller than the sum of its proper divisors (163381656186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139728369474 is a wasteful number, since it uses less digits than its factorization.

139728369474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9364754 (or 9364751 counting only the distinct ones).

The product of its digits is 54867456, while the sum is 63.

The spelling of 139728369474 in words is "one hundred thirty-nine billion, seven hundred twenty-eight million, three hundred sixty-nine thousand, four hundred seventy-four".