7621631825 has 12 divisors (see below), whose sum is σ = 9477607308. Its totient is φ = 6080025600.

The previous prime is 7621631807. The next prime is 7621631851. The reversal of 7621631825 is 5281361267.

It can be written as a sum of positive squares in 6 ways, for example, as 523906321 + 7097725504 = 22889^2 + 84248^2 .

It is not a de Polignac number, because 7621631825 - 2⁶ = 7621631761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 422996 + ... + 440645.

It is an arithmetic number, because the mean of its divisors is an integer number (789800609).

Almost surely, 2^7621631825 is an apocalyptic number.

It is an amenable number.

7621631825 is a deficient number, since it is larger than the sum of its proper divisors (1855975483).

7621631825 is a wasteful number, since it uses less digits than its factorization.

7621631825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864004 (or 863999 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 7621631825 is about 87301.9577386441. The cubic root of 7621631825 is about 1967.9587387830.

The spelling of 7621631825 in words is "seven billion, six hundred twenty-one million, six hundred thirty-one thousand, eight hundred twenty-five".