617638648 has 32 divisors (see below), whose sum is σ = 1268910000. Its totient is φ = 279509760.

The previous prime is 617638639. The next prime is 617638657. The reversal of 617638648 is 846836716.

It is an interprime number because it is at equal distance from previous prime (617638639) and next prime (617638657).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4828 + ... + 35476.

Almost surely, 2^617638648 is an apocalyptic number.

It is an amenable number.

617638648 is an abundant number, since it is smaller than the sum of its proper divisors (651271352).

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

617638648 is a wasteful number, since it uses less digits than its factorization.

617638648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30895 (or 30891 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 617638648 is about 24852.3368720127. The cubic root of 617638648 is about 851.6179784250.

The spelling of 617638648 in words is "six hundred seventeen million, six hundred thirty-eight thousand, six hundred forty-eight".