15572135940 has 24 divisors (see below), whose sum is σ = 43601980800. Its totient is φ = 4152569568.

The previous prime is 15572135939. The next prime is 15572135981. The reversal of 15572135940 is 4953127551.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 15572135892 and 15572135901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129767740 + ... + 129767859.

It is an arithmetic number, because the mean of its divisors is an integer number (1816749200).

Almost surely, 2^15572135940 is an apocalyptic number.

15572135940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15572135940 is an abundant number, since it is smaller than the sum of its proper divisors (28029844860).

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

15572135940 is a wasteful number, since it uses less digits than its factorization.

15572135940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259535611 (or 259535609 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 15572135940 in words is "fifteen billion, five hundred seventy-two million, one hundred thirty-five thousand, nine hundred forty".