130236726978 has 18 divisors (see below), whose sum is σ = 282182892537. Its totient is φ = 43411731960.

The previous prime is 130236726959. The next prime is 130236727007. The reversal of 130236726978 is 879627632031.

130236726978 is a `hidden beast` number, since 1 + 302 + 3 + 6 + 7 + 269 + 78 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 92025469449 + 38211257529 = 303357^2 + 195477^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=255183.

It is a super-2 number, since 2×130236726978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1488568 + ... + 1573628.

Almost surely, 2^130236726978 is an apocalyptic number.

130236726978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

130236726978 is an abundant number, since it is smaller than the sum of its proper divisors (151946165559).

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

130236726978 is an frugal number, since it uses more digits than its factorization.

130236726978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170130 (or 85066 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 130236726978 in words is "one hundred thirty billion, two hundred thirty-six million, seven hundred twenty-six thousand, nine hundred seventy-eight".