15557130078 has 32 divisors (see below), whose sum is σ = 35818723584. Its totient is φ = 4412448192.

The previous prime is 15557130047. The next prime is 15557130079. The reversal of 15557130078 is 87003175551.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15557130079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1346100 + ... + 1357607.

It is an arithmetic number, because the mean of its divisors is an integer number (1119335112).

Almost surely, 2^15557130078 is an apocalyptic number.

15557130078 is an abundant number, since it is smaller than the sum of its proper divisors (20261593506).

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

15557130078 is a wasteful number, since it uses less digits than its factorization.

15557130078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703856.

The product of its (nonzero) digits is 147000, while the sum is 42.

The spelling of 15557130078 in words is "fifteen billion, five hundred fifty-seven million, one hundred thirty thousand, seventy-eight".