15136940474 has 4 divisors (see below), whose sum is σ = 22705410714. Its totient is φ = 7568470236.

The previous prime is 15136940473. The next prime is 15136940531. The reversal of 15136940474 is 47404963151.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8815895449 + 6321045025 = 93893^2 + 79505^2 .

It is not an unprimeable number, because it can be changed into a prime (15136940473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3784235117 + ... + 3784235120.

Almost surely, 2^15136940474 is an apocalyptic number.

15136940474 is a deficient number, since it is larger than the sum of its proper divisors (7568470240).

15136940474 is an equidigital number, since it uses as much as digits as its factorization.

15136940474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568470239.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 15136940474 in words is "fifteen billion, one hundred thirty-six million, nine hundred forty thousand, four hundred seventy-four".