7795257921 has 12 divisors (see below), whose sum is σ = 12283436880. Its totient is φ = 4724398680.

The previous prime is 7795257919. The next prime is 7795257947. The reversal of 7795257921 is 1297525977.

It is a happy number.

It is not a de Polignac number, because 7795257921 - 2¹ = 7795257919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7795257961) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39369891 + ... + 39370088.

It is an arithmetic number, because the mean of its divisors is an integer number (1023619740).

Almost surely, 2^7795257921 is an apocalyptic number.

It is an amenable number.

7795257921 is a deficient number, since it is larger than the sum of its proper divisors (4488178959).

7795257921 is a wasteful number, since it uses less digits than its factorization.

7795257921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78739996 (or 78739993 counting only the distinct ones).

The product of its digits is 2778300, while the sum is 54.

The square root of 7795257921 is about 88290.7578458810. The cubic root of 7795257921 is about 1982.7905014026.

The spelling of 7795257921 in words is "seven billion, seven hundred ninety-five million, two hundred fifty-seven thousand, nine hundred twenty-one".