15557794980 has 144 divisors (see below), whose sum is σ = 54572091840. Its totient is φ = 3282515712.

The previous prime is 15557794969. The next prime is 15557794991. The reversal of 15557794980 is 8949775551.

15557794980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (15557794969) and next prime (15557794991).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 165310 + ... + 241749.

It is an arithmetic number, because the mean of its divisors is an integer number (378972860).

Almost surely, 2^15557794980 is an apocalyptic number.

15557794980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15557794980 is an abundant number, since it is smaller than the sum of its proper divisors (39014296860).

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

15557794980 is a wasteful number, since it uses less digits than its factorization.

15557794980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407098 (or 407089 counting only the distinct ones).

The product of its (nonzero) digits is 15876000, while the sum is 60.

The spelling of 15557794980 in words is "fifteen billion, five hundred fifty-seven million, seven hundred ninety-four thousand, nine hundred eighty".