131278167620 has 12 divisors (see below), whose sum is σ = 275684152044. Its totient is φ = 52511267040.

The previous prime is 131278167577. The next prime is 131278167677. The reversal of 131278167620 is 26761872131.

It can be written as a sum of positive squares in 2 ways, for example, as 88386100804 + 42892066816 = 297298^2 + 207104^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3281954171 + ... + 3281954210.

It is an arithmetic number, because the mean of its divisors is an integer number (22973679337).

Almost surely, 2^131278167620 is an apocalyptic number.

131278167620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131278167620 is an abundant number, since it is smaller than the sum of its proper divisors (144405984424).

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

131278167620 is a wasteful number, since it uses less digits than its factorization.

131278167620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563908390 (or 6563908388 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The spelling of 131278167620 in words is "one hundred thirty-one billion, two hundred seventy-eight million, one hundred sixty-seven thousand, six hundred twenty".