131556735234 has 72 divisors (see below), whose sum is σ = 298969493940. Its totient is φ = 41759214336.

The previous prime is 131556735229. The next prime is 131556735257. The reversal of 131556735234 is 432537655131.

131556735234 is a `hidden beast` number, since 1 + 3 + 1 + 5 + 56 + 73 + 523 + 4 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 79606929609 + 51949805625 = 282147^2 + 227925^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 131556735234.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2758092 + ... + 2805384.

Almost surely, 2^131556735234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131556735234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149484746970).

131556735234 is an abundant number, since it is smaller than the sum of its proper divisors (167412758706).

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

131556735234 is a wasteful number, since it uses less digits than its factorization.

131556735234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47476 (or 47400 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 45.

The spelling of 131556735234 in words is "one hundred thirty-one billion, five hundred fifty-six million, seven hundred thirty-five thousand, two hundred thirty-four".