11978157080 has 32 divisors (see below), whose sum is σ = 28369321200. Its totient is φ = 4539090816.

The previous prime is 11978157047. The next prime is 11978157119. The reversal of 11978157080 is 8075187911.

It is a congruent number.

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, 7879607 + ... + 7881126.

Almost surely, 2^11978157080 is an apocalyptic number.

11978157080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11978157080 is an abundant number, since it is smaller than the sum of its proper divisors (16391164120).

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

11978157080 is a wasteful number, since it uses less digits than its factorization.

11978157080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15760763 (or 15760759 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 47.

The spelling of 11978157080 in words is "eleven billion, nine hundred seventy-eight million, one hundred fifty-seven thousand, eighty".