15678920740 has 24 divisors (see below), whose sum is σ = 37629410112. Its totient is φ = 5375629920.

The previous prime is 15678920723. The next prime is 15678920779. The reversal of 15678920740 is 4702987651.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 55996006 + ... + 55996285.

It is an arithmetic number, because the mean of its divisors is an integer number (1567892088).

Almost surely, 2^15678920740 is an apocalyptic number.

15678920740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15678920740 is an abundant number, since it is smaller than the sum of its proper divisors (21950489372).

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

15678920740 is a wasteful number, since it uses less digits than its factorization.

15678920740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111992307 (or 111992305 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 15678920740 in words is "fifteen billion, six hundred seventy-eight million, nine hundred twenty thousand, seven hundred forty".