157650705 has 40 divisors (see below), whose sum is σ = 285588072. Its totient is φ = 83192832.

The previous prime is 157650659. The next prime is 157650709. The reversal of 157650705 is 507056751.

It can be written as a sum of positive squares in 4 ways, for example, as 33907329 + 123743376 = 5823^2 + 11124^2 .

It is not a de Polignac number, because 157650705 - 2¹² = 157646609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157650705.

It is not an unprimeable number, because it can be changed into a prime (157650709) 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 39 ways as a sum of consecutive naturals, for example, 37279 + ... + 41291.

Almost surely, 2^157650705 is an apocalyptic number.

157650705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

157650705 is a deficient number, since it is larger than the sum of its proper divisors (127937367).

157650705 is an equidigital number, since it uses as much as digits as its factorization.

157650705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 157650705 is about 12555.9031933191. The cubic root of 157650705 is about 540.2133416284.

The spelling of 157650705 in words is "one hundred fifty-seven million, six hundred fifty thousand, seven hundred five".