648770715 has 40 divisors (see below), whose sum is σ = 1180388880. Its totient is φ = 340832448.

The previous prime is 648770693. The next prime is 648770719. The reversal of 648770715 is 517077846.

It is not a de Polignac number, because 648770715 - 2⁸ = 648770459 is a prime.

It is a super-2 number, since 2×648770715² = 841806881283222450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (648770719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15181 + ... + 39089.

It is an arithmetic number, because the mean of its divisors is an integer number (29509722).

Almost surely, 2^648770715 is an apocalyptic number.

648770715 is a deficient number, since it is larger than the sum of its proper divisors (531618165).

648770715 is a wasteful number, since it uses less digits than its factorization.

648770715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23993 (or 23984 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 648770715 is about 25470.9778964216. The cubic root of 648770715 is about 865.6926813758.

The spelling of 648770715 in words is "six hundred forty-eight million, seven hundred seventy thousand, seven hundred fifteen".