6121940720 has 80 divisors (see below), whose sum is σ = 17223772608. Its totient is φ = 1975480320.

The previous prime is 6121940719. The next prime is 6121940753. The reversal of 6121940720 is 270491216.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 312011 + ... + 331050.

Almost surely, 2^6121940720 is an apocalyptic number.

It is an amenable number.

6121940720 is an abundant number, since it is smaller than the sum of its proper divisors (11101831888).

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

6121940720 is a wasteful number, since it uses less digits than its factorization.

6121940720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643098 (or 643092 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 6121940720 is about 78242.8317483461. The cubic root of 6121940720 is about 1829.3481827629.

The spelling of 6121940720 in words is "six billion, one hundred twenty-one million, nine hundred forty thousand, seven hundred twenty".