15538769540 has 48 divisors (see below), whose sum is σ = 37303265664. Its totient is φ = 5326118400.

The previous prime is 15538769537. The next prime is 15538769567. The reversal of 15538769540 is 4596783551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580655 + ... + 606825.

It is an arithmetic number, because the mean of its divisors is an integer number (777151368).

Almost surely, 2^15538769540 is an apocalyptic number.

15538769540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15538769540 is an abundant number, since it is smaller than the sum of its proper divisors (21764496124).

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

15538769540 is a wasteful number, since it uses less digits than its factorization.

15538769540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30428 (or 30426 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 15538769540 in words is "fifteen billion, five hundred thirty-eight million, seven hundred sixty-nine thousand, five hundred forty".