131156666420 has 48 divisors (see below), whose sum is σ = 298392087168. Its totient is φ = 48137078400.

The previous prime is 131156666413. The next prime is 131156666423. The reversal of 131156666420 is 24666651131.

It is a super-2 number, since 2×131156666420² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131156666423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1466906 + ... + 1553745.

It is an arithmetic number, because the mean of its divisors is an integer number (6216501816).

Almost surely, 2^131156666420 is an apocalyptic number.

131156666420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131156666420 is an abundant number, since it is smaller than the sum of its proper divisors (167235420748).

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

131156666420 is a wasteful number, since it uses less digits than its factorization.

131156666420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020840 (or 3020838 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 131156666420 in words is "one hundred thirty-one billion, one hundred fifty-six million, six hundred sixty-six thousand, four hundred twenty".