7551481864 has 16 divisors (see below), whose sum is σ = 14165459820. Its totient is φ = 3774025920.

The previous prime is 7551481843. The next prime is 7551481867. The reversal of 7551481864 is 4681841557.

It can be written as a sum of positive squares in 2 ways, for example, as 6630844900 + 920636964 = 81430^2 + 30342^2 .

It is not an unprimeable number, because it can be changed into a prime (7551481867) 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, 195567 + ... + 230974.

Almost surely, 2^7551481864 is an apocalyptic number.

It is an amenable number.

7551481864 is a deficient number, since it is larger than the sum of its proper divisors (6613977956).

7551481864 is a wasteful number, since it uses less digits than its factorization.

7551481864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428760 (or 428756 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 49.

The square root of 7551481864 is about 86899.2627356527. The cubic root of 7551481864 is about 1961.9023824317.

The spelling of 7551481864 in words is "seven billion, five hundred fifty-one million, four hundred eighty-one thousand, eight hundred sixty-four".