131621055554884 has 27 divisors (see below), whose sum is σ = 267943190063997. Its totient is φ = 56408954973504.

The previous prime is 131621055554831. The next prime is 131621055555019. The reversal of 131621055554884 is 488455550126131.

The square root of 131621055554884 is 11472622.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 92606940562500 + 39014114992384 = 9623250^2 + 6246128^2 .

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, 160206972 + ... + 161026444.

Almost surely, 2^{131621055554884} is an apocalyptic number.

131621055554884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

131621055554884 is the 11472622-nd square number.

It is an amenable number.

131621055554884 is an abundant number, since it is smaller than the sum of its proper divisors (136322134509113).

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

131621055554884 is an frugal number, since it uses more digits than its factorization.

131621055554884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638964 (or 819482 counting only the distinct ones).

The product of its (nonzero) digits is 23040000, while the sum is 58.

The spelling of 131621055554884 in words is "one hundred thirty-one trillion, six hundred twenty-one billion, fifty-five million, five hundred fifty-four thousand, eight hundred eighty-four".