6121561503455 has 8 divisors (see below), whose sum is σ = 7449336815904. Its totient is φ = 4828273861600.

The previous prime is 6121561503439. The next prime is 6121561503493. The reversal of 6121561503455 is 5543051651216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6121561503455 - 2⁴ = 6121561503439 is a prime.

It is a Duffinian number.

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, 8621917256 + ... + 8621917965.

It is an arithmetic number, because the mean of its divisors is an integer number (931167101988).

Almost surely, 2^{6121561503455} is an apocalyptic number.

6121561503455 is a deficient number, since it is larger than the sum of its proper divisors (1327775312449).

6121561503455 is a wasteful number, since it uses less digits than its factorization.

6121561503455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17243835297.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 6121561503455 in words is "six trillion, one hundred twenty-one billion, five hundred sixty-one million, five hundred three thousand, four hundred fifty-five".