648951616 has 28 divisors (see below), whose sum is σ = 1288572480. Its totient is φ = 324272000.

The previous prime is 648951587. The next prime is 648951617. The reversal of 648951616 is 616159846.

It is a super-2 number, since 2×648951616² = 842276399818022912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648951617) 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, 197991 + ... + 201241.

Almost surely, 2^648951616 is an apocalyptic number.

It is an amenable number.

648951616 is a deficient number, since it is larger than the sum of its proper divisors (639620864).

648951616 is a wasteful number, since it uses less digits than its factorization.

648951616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382 (or 6372 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 648951616 is about 25474.5287689488. The cubic root of 648951616 is about 865.7731361573.

The spelling of 648951616 in words is "six hundred forty-eight million, nine hundred fifty-one thousand, six hundred sixteen".