15640422460 has 24 divisors (see below), whose sum is σ = 35371417536. Its totient is φ = 5774925120.

The previous prime is 15640422443. The next prime is 15640422557. The reversal of 15640422460 is 6422404651.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30077476 + ... + 30077995.

It is an arithmetic number, because the mean of its divisors is an integer number (1473809064).

Almost surely, 2^15640422460 is an apocalyptic number.

15640422460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15640422460 is an abundant number, since it is smaller than the sum of its proper divisors (19730995076).

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

15640422460 is a wasteful number, since it uses less digits than its factorization.

15640422460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60155493 (or 60155491 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The spelling of 15640422460 in words is "fifteen billion, six hundred forty million, four hundred twenty-two thousand, four hundred sixty".