50551612115621 has 2 divisors, whose sum is σ = 50551612115622. Its totient is φ = 50551612115620.

The previous prime is 50551612115603. The next prime is 50551612115731. The reversal of 50551612115621 is 12651121615505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44137620268225 + 6413991847396 = 6643615^2 + 2532586^2 .

It is a cyclic number.

It is not a de Polignac number, because 50551612115621 - 2³⁸ = 50276734208677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50551615115621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25275806057810 + 25275806057811.

It is an arithmetic number, because the mean of its divisors is an integer number (25275806057811).

Almost surely, 2^{50551612115621} is an apocalyptic number.

It is an amenable number.

50551612115621 is a deficient number, since it is larger than the sum of its proper divisors (1).

50551612115621 is an equidigital number, since it uses as much as digits as its factorization.

50551612115621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 41.

The spelling of 50551612115621 in words is "fifty trillion, five hundred fifty-one billion, six hundred twelve million, one hundred fifteen thousand, six hundred twenty-one".