7920581630 has 32 divisors (see below), whose sum is σ = 15378703200. Its totient is φ = 2919768192.

The previous prime is 7920581567. The next prime is 7920581671. The reversal of 7920581630 is 361850297.

It is a super-2 number, since 2×7920581630² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31256 + ... + 129684.

It is an arithmetic number, because the mean of its divisors is an integer number (480584475).

Almost surely, 2^7920581630 is an apocalyptic number.

7920581630 is a deficient number, since it is larger than the sum of its proper divisors (7458121570).

7920581630 is a wasteful number, since it uses less digits than its factorization.

7920581630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99068.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 7920581630 is about 88997.6495757051. The cubic root of 7920581630 is about 1993.3597806421.

The spelling of 7920581630 in words is "seven billion, nine hundred twenty million, five hundred eighty-one thousand, six hundred thirty".