657163140 has 48 divisors (see below), whose sum is σ = 1842671040. Its totient is φ = 174994560.

The previous prime is 657163123. The next prime is 657163183. The reversal of 657163140 is 41361756.

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 15 ways as a sum of consecutive naturals, for example, 36930 + ... + 51750.

It is an arithmetic number, because the mean of its divisors is an integer number (38388980).

Almost surely, 2^657163140 is an apocalyptic number.

657163140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

657163140 is an abundant number, since it is smaller than the sum of its proper divisors (1185507900).

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

657163140 is a wasteful number, since it uses less digits than its factorization.

657163140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15572 (or 15570 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 657163140 is about 25635.1933872167. The cubic root of 657163140 is about 869.4095346065.

The spelling of 657163140 in words is "six hundred fifty-seven million, one hundred sixty-three thousand, one hundred forty".