156520980 has 288 divisors, whose sum is σ = 618928128. Its totient is φ = 31046400.

The previous prime is 156520961. The next prime is 156520981. The reversal of 156520980 is 89025651.

It is a happy number.

156520980 is a `hidden beast` number, since 1 + 56 + 520 + 9 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156520981) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 318535 + ... + 319025.

It is an arithmetic number, because the mean of its divisors is an integer number (2149056).

Almost surely, 2^156520980 is an apocalyptic number.

156520980 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 156520980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309464064).

156520980 is an abundant number, since it is smaller than the sum of its proper divisors (462407148).

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

156520980 is a wasteful number, since it uses less digits than its factorization.

156520980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 156520980 is about 12510.8345045405. The cubic root of 156520980 is about 538.9198573308.

The spelling of 156520980 in words is "one hundred fifty-six million, five hundred twenty thousand, nine hundred eighty".