161257696 has 12 divisors (see below), whose sum is σ = 317476152. Its totient is φ = 80628832.

The previous prime is 161257687. The next prime is 161257703. The reversal of 161257696 is 696752161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2519620 + ... + 2519683.

It is an arithmetic number, because the mean of its divisors is an integer number (26456346).

Almost surely, 2^161257696 is an apocalyptic number.

161257696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161257696 is a deficient number, since it is larger than the sum of its proper divisors (156218456).

161257696 is an equidigital number, since it uses as much as digits as its factorization.

161257696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5039313 (or 5039305 counting only the distinct ones).

The product of its digits is 136080, while the sum is 43.

The square root of 161257696 is about 12698.7281252888. The cubic root of 161257696 is about 544.3022757798.

The spelling of 161257696 in words is "one hundred sixty-one million, two hundred fifty-seven thousand, six hundred ninety-six".