158878725 has 24 divisors (see below), whose sum is σ = 265399680. Its totient is φ = 83857920.

The previous prime is 158878721. The next prime is 158878771. The reversal of 158878725 is 527878851.

It is not a de Polignac number, because 158878725 - 2² = 158878721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158878721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3645 + ... + 18194.

It is an arithmetic number, because the mean of its divisors is an integer number (11058320).

Almost surely, 2^158878725 is an apocalyptic number.

158878725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158878725 is a deficient number, since it is larger than the sum of its proper divisors (106520955).

158878725 is a wasteful number, since it uses less digits than its factorization.

158878725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21949 (or 21944 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 51.

The square root of 158878725 is about 12604.7104290420. The cubic root of 158878725 is about 541.6123790432.

The spelling of 158878725 in words is "one hundred fifty-eight million, eight hundred seventy-eight thousand, seven hundred twenty-five".