648692457 has 16 divisors (see below), whose sum is σ = 988840320. Its totient is φ = 370547712.

The previous prime is 648692419. The next prime is 648692467. The reversal of 648692457 is 754296846.

It is not a de Polignac number, because 648692457 - 2¹⁵ = 648659689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648692417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105993 + ... + 111945.

It is an arithmetic number, because the mean of its divisors is an integer number (61802520).

Almost surely, 2^648692457 is an apocalyptic number.

It is an amenable number.

648692457 is a deficient number, since it is larger than the sum of its proper divisors (340147863).

648692457 is a wasteful number, since it uses less digits than its factorization.

648692457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11152.

The product of its digits is 2903040, while the sum is 51.

The square root of 648692457 is about 25469.4416310998. The cubic root of 648692457 is about 865.6578719018.

The spelling of 648692457 in words is "six hundred forty-eight million, six hundred ninety-two thousand, four hundred fifty-seven".