6121079780408 has 32 divisors (see below), whose sum is σ = 12025718796960. Its totient is φ = 2915325726720.

The previous prime is 6121079780393. The next prime is 6121079780429. The reversal of 6121079780408 is 8040879701216.

It is a happy number.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 6121079780408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68973785 + ... + 69062472.

It is an arithmetic number, because the mean of its divisors is an integer number (375803712405).

Almost surely, 2^{6121079780408} is an apocalyptic number.

It is an amenable number.

6121079780408 is a deficient number, since it is larger than the sum of its proper divisors (5904639016552).

6121079780408 is a wasteful number, since it uses less digits than its factorization.

6121079780408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138036527 (or 138036523 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 6121079780408 in words is "six trillion, one hundred twenty-one billion, seventy-nine million, seven hundred eighty thousand, four hundred eight".