157561770 has 32 divisors (see below), whose sum is σ = 387374400. Its totient is φ = 40991360.

The previous prime is 157561769. The next prime is 157561771. The reversal of 157561770 is 77165751.

157561770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (157561769) and next prime (157561771).

It is a super-2 number, since 2×157561770² = 49651422731065800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (157561771) 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 15 ways as a sum of consecutive naturals, for example, 62820 + ... + 65279.

It is an arithmetic number, because the mean of its divisors is an integer number (12105450).

Almost surely, 2^157561770 is an apocalyptic number.

157561770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157561770 is an abundant number, since it is smaller than the sum of its proper divisors (229812630).

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

157561770 is a wasteful number, since it uses less digits than its factorization.

157561770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128150.

The product of its (nonzero) digits is 51450, while the sum is 39.

The square root of 157561770 is about 12552.3611324722. The cubic root of 157561770 is about 540.1117395653. Note that the first 3 decimals are identical.

The spelling of 157561770 in words is "one hundred fifty-seven million, five hundred sixty-one thousand, seven hundred seventy".