50121517221557 has 16 divisors (see below), whose sum is σ = 50868348503040. Its totient is φ = 49377552627312.

The previous prime is 50121517221527. The next prime is 50121517221613. The reversal of 50121517221557 is 75512271512105.

It is a cyclic number.

It is not a de Polignac number, because 50121517221557 - 2⁶ = 50121517221493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50121517221527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138106778 + ... + 138469220.

It is an arithmetic number, because the mean of its divisors is an integer number (3179271781440).

Almost surely, 2^{50121517221557} is an apocalyptic number.

It is an amenable number.

50121517221557 is a deficient number, since it is larger than the sum of its proper divisors (746831281483).

50121517221557 is a wasteful number, since it uses less digits than its factorization.

50121517221557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366392.

The product of its (nonzero) digits is 245000, while the sum is 44.

The spelling of 50121517221557 in words is "fifty trillion, one hundred twenty-one billion, five hundred seventeen million, two hundred twenty-one thousand, five hundred fifty-seven".