15740462521 has 9 divisors (see below), whose sum is σ = 18311355621. Its totient is φ = 13491072252.

The previous prime is 15740462497. The next prime is 15740462531. The reversal of 15740462521 is 12526404751.

The square root of 15740462521 is 125461.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 15740462521 - 2⁷ = 15740462393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15740462531) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 869266 + ... + 887188.

It is an arithmetic number, because the mean of its divisors is an integer number (2034595069).

Almost surely, 2^15740462521 is an apocalyptic number.

15740462521 is the 125461-st square number.

15740462521 is the 62731-st centered octagonal number.

It is an amenable number.

15740462521 is a deficient number, since it is larger than the sum of its proper divisors (2570893100).

15740462521 is an frugal number, since it uses more digits than its factorization.

15740462521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35860 (or 17930 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 15740462521 in words is "fifteen billion, seven hundred forty million, four hundred sixty-two thousand, five hundred twenty-one".