156137540 has 24 divisors (see below), whose sum is σ = 353111640. Its totient is φ = 57650688.

The previous prime is 156137539. The next prime is 156137543. The reversal of 156137540 is 45731651.

It can be written as a sum of positive squares in 4 ways, for example, as 586756 + 155550784 = 766^2 + 12472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 156137497 and 156137506.

It is not an unprimeable number, because it can be changed into a prime (156137543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300005 + ... + 300524.

It is an arithmetic number, because the mean of its divisors is an integer number (14712985).

Almost surely, 2^156137540 is an apocalyptic number.

156137540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156137540 is an abundant number, since it is smaller than the sum of its proper divisors (196974100).

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

156137540 is a wasteful number, since it uses less digits than its factorization.

156137540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600551 (or 600549 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 156137540 is about 12495.5007902845. The cubic root of 156137540 is about 538.4794213736.

The spelling of 156137540 in words is "one hundred fifty-six million, one hundred thirty-seven thousand, five hundred forty".