157558506 has 64 divisors (see below), whose sum is σ = 377042688. Its totient is φ = 42951168.

The previous prime is 157558501. The next prime is 157558573. The reversal of 157558506 is 605855751.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (157558501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81406 + ... + 83318.

It is an arithmetic number, because the mean of its divisors is an integer number (5891292).

Almost surely, 2^157558506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 157558506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188521344).

157558506 is an abundant number, since it is smaller than the sum of its proper divisors (219484182).

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

157558506 is a wasteful number, since it uses less digits than its factorization.

157558506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015.

The product of its (nonzero) digits is 210000, while the sum is 42.

The square root of 157558506 is about 12552.2311164191. The cubic root of 157558506 is about 540.1080099447.

The spelling of 157558506 in words is "one hundred fifty-seven million, five hundred fifty-eight thousand, five hundred six".