15612004540 has 24 divisors (see below), whose sum is σ = 35765683632. Its totient is φ = 5677092480.

The previous prime is 15612004459. The next prime is 15612004549. The reversal of 15612004540 is 4540021651.

It is a super-2 number, since 2×15612004540² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15612004499 and 15612004508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15612004549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35481609 + ... + 35482048.

It is an arithmetic number, because the mean of its divisors is an integer number (1490236818).

Almost surely, 2^15612004540 is an apocalyptic number.

15612004540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15612004540 is an abundant number, since it is smaller than the sum of its proper divisors (20153679092).

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

15612004540 is a wasteful number, since it uses less digits than its factorization.

15612004540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70963677 (or 70963675 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The spelling of 15612004540 in words is "fifteen billion, six hundred twelve million, four thousand, five hundred forty".