648951807 has 16 divisors (see below), whose sum is σ = 995182592. Its totient is φ = 368465760.

The previous prime is 648951757. The next prime is 648951827. The reversal of 648951807 is 708159846.

It is a de Polignac number, because none of the positive numbers 2^k-648951807 is a prime.

It is a super-2 number, since 2×648951807² = 842276895617130498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648951827) 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, 95119 + ... + 101712.

It is an arithmetic number, because the mean of its divisors is an integer number (62198912).

Almost surely, 2^648951807 is an apocalyptic number.

648951807 is a deficient number, since it is larger than the sum of its proper divisors (346230785).

648951807 is a wasteful number, since it uses less digits than its factorization.

648951807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196998.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 648951807 is about 25474.5325177912. The cubic root of 648951807 is about 865.7732210956.

The spelling of 648951807 in words is "six hundred forty-eight million, nine hundred fifty-one thousand, eight hundred seven".