157780625 has 10 divisors (see below), whose sum is σ = 197163450. Its totient is φ = 126224000.

The previous prime is 157780613. The next prime is 157780633. The reversal of 157780625 is 526087751.

It can be written as a sum of positive squares in 5 ways, for example, as 88491649 + 69288976 = 9407^2 + 8324^2 .

It is not a de Polignac number, because 157780625 - 2¹⁴ = 157764241 is a prime.

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 125600 + ... + 126849.

It is an arithmetic number, because the mean of its divisors is an integer number (19716345).

Almost surely, 2^157780625 is an apocalyptic number.

It is an amenable number.

157780625 is a deficient number, since it is larger than the sum of its proper divisors (39382825).

157780625 is an frugal number, since it uses more digits than its factorization.

157780625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252469 (or 252454 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 157780625 is about 12561.0757899154. The cubic root of 157780625 is about 540.3616975491.

The spelling of 157780625 in words is "one hundred fifty-seven million, seven hundred eighty thousand, six hundred twenty-five".