151531902440 has 64 divisors (see below), whose sum is σ = 361387636560. Its totient is φ = 56986439680.

The previous prime is 151531902427. The next prime is 151531902443. The reversal of 151531902440 is 44209135151.

It can be written as a sum of positive squares in 8 ways, for example, as 129264697156 + 22267205284 = 359534^2 + 149222^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 151531902440.

It is not an unprimeable number, because it can be changed into a prime (151531902443) 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, 521474 + ... + 758286.

Almost surely, 2^151531902440 is an apocalyptic number.

151531902440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151531902440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180693818280).

151531902440 is an abundant number, since it is smaller than the sum of its proper divisors (209855734120).

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

151531902440 is a wasteful number, since it uses less digits than its factorization.

151531902440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237782 (or 237778 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 151531902440 in words is "one hundred fifty-one billion, five hundred thirty-one million, nine hundred two thousand, four hundred forty".