657891054 has 48 divisors (see below), whose sum is σ = 1470950208. Its totient is φ = 212391936.

The previous prime is 657891049. The next prime is 657891061. The reversal of 657891054 is 450198756.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78054 + ... + 86070.

It is an arithmetic number, because the mean of its divisors is an integer number (30644796).

Almost surely, 2^657891054 is an apocalyptic number.

657891054 is an abundant number, since it is smaller than the sum of its proper divisors (813059154).

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

657891054 is a wasteful number, since it uses less digits than its factorization.

657891054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8169 (or 8166 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 657891054 is about 25649.3870102192. The cubic root of 657891054 is about 869.7304198449.

The spelling of 657891054 in words is "six hundred fifty-seven million, eight hundred ninety-one thousand, fifty-four".