657156468 has 12 divisors (see below), whose sum is σ = 1533365120. Its totient is φ = 219052152.

The previous prime is 657156463. The next prime is 657156469. The reversal of 657156468 is 864651756.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657156463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27381508 + ... + 27381531.

Almost surely, 2^657156468 is an apocalyptic number.

It is an amenable number.

657156468 is an abundant number, since it is smaller than the sum of its proper divisors (876208652).

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

657156468 is a wasteful number, since it uses less digits than its factorization.

657156468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54763046 (or 54763044 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 657156468 is about 25635.0632532865. The cubic root of 657156468 is about 869.4065923031.

The spelling of 657156468 in words is "six hundred fifty-seven million, one hundred fifty-six thousand, four hundred sixty-eight".