7251661164 has 36 divisors (see below), whose sum is σ = 18598616792. Its totient is φ = 2197472640.

The previous prime is 7251661159. The next prime is 7251661187. The reversal of 7251661164 is 4611661527.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2495677 + ... + 2498580.

Almost surely, 2^7251661164 is an apocalyptic number.

It is an amenable number.

7251661164 is an abundant number, since it is smaller than the sum of its proper divisors (11346955628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7251661164 is a wasteful number, since it uses less digits than its factorization.

7251661164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994286 (or 4994273 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 7251661164 is about 85156.6859618198. The cubic root of 7251661164 is about 1935.5861288169.

The spelling of 7251661164 in words is "seven billion, two hundred fifty-one million, six hundred sixty-one thousand, one hundred sixty-four".