50126546157581 has 4 divisors (see below), whose sum is σ = 50948292815964. Its totient is φ = 49304799499200.

The previous prime is 50126546157539. The next prime is 50126546157629. The reversal of 50126546157581 is 18575164562105.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4082585932681 + 46043960224900 = 2020541^2 + 6785570^2 .

It is a cyclic number.

It is not a de Polignac number, because 50126546157581 - 2¹⁴ = 50126546141197 is a prime.

It is a super-2 number, since 2×50126546157581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50126546151581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410873329100 + ... + 410873329221.

It is an arithmetic number, because the mean of its divisors is an integer number (12737073203991).

Almost surely, 2^{50126546157581} is an apocalyptic number.

It is an amenable number.

50126546157581 is a deficient number, since it is larger than the sum of its proper divisors (821746658383).

50126546157581 is an equidigital number, since it uses as much as digits as its factorization.

50126546157581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821746658382.

The product of its (nonzero) digits is 10080000, while the sum is 56.

The spelling of 50126546157581 in words is "fifty trillion, one hundred twenty-six billion, five hundred forty-six million, one hundred fifty-seven thousand, five hundred eighty-one".