7971635220 has 48 divisors (see below), whose sum is σ = 22795492608. Its totient is φ = 2080539520.

The previous prime is 7971635209. The next prime is 7971635249. The reversal of 7971635220 is 225361797.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1410591 + ... + 1416230.

It is an arithmetic number, because the mean of its divisors is an integer number (474906096).

Almost surely, 2^7971635220 is an apocalyptic number.

It is an amenable number.

7971635220 is an abundant number, since it is smaller than the sum of its proper divisors (14823857388).

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

7971635220 is a wasteful number, since it uses less digits than its factorization.

7971635220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826880 (or 2826878 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 42.

The square root of 7971635220 is about 89284.0143586745. The cubic root of 7971635220 is about 1997.6334692038.

The spelling of 7971635220 in words is "seven billion, nine hundred seventy-one million, six hundred thirty-five thousand, two hundred twenty".