7621640120 has 32 divisors (see below), whose sum is σ = 17429821920. Its totient is φ = 2998677120.

The previous prime is 7621640099. The next prime is 7621640137. The reversal of 7621640120 is 210461267.

It is a super-2 number, since 2×7621640120² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559372 + ... + 1564251.

It is an arithmetic number, because the mean of its divisors is an integer number (544681935).

Almost surely, 2^7621640120 is an apocalyptic number.

It is an amenable number.

7621640120 is an abundant number, since it is smaller than the sum of its proper divisors (9808181800).

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

7621640120 is a wasteful number, since it uses less digits than its factorization.

7621640120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123695 (or 3123691 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 7621640120 is about 87302.0052461569. The cubic root of 7621640120 is about 1967.9594527251.

The spelling of 7621640120 in words is "seven billion, six hundred twenty-one million, six hundred forty thousand, one hundred twenty".