157549878 has 12 divisors (see below), whose sum is σ = 341358108. Its totient is φ = 52516620.

The previous prime is 157549831. The next prime is 157549891. The reversal of 157549878 is 878945751.

157549878 is a `hidden beast` number, since 15 + 7 + 549 + 87 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4376368 + ... + 4376403.

It is an arithmetic number, because the mean of its divisors is an integer number (28446509).

Almost surely, 2^157549878 is an apocalyptic number.

157549878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157549878 is an abundant number, since it is smaller than the sum of its proper divisors (183808230).

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

157549878 is a wasteful number, since it uses less digits than its factorization.

157549878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8752779 (or 8752776 counting only the distinct ones).

The product of its digits is 2822400, while the sum is 54.

The square root of 157549878 is about 12551.8874277935. The cubic root of 157549878 is about 540.0981508832.

The spelling of 157549878 in words is "one hundred fifty-seven million, five hundred forty-nine thousand, eight hundred seventy-eight".