51436408323577 has 4 divisors (see below), whose sum is σ = 51465353968756. Its totient is φ = 51407462678400.

The previous prime is 51436408323551. The next prime is 51436408323581. The reversal of 51436408323577 is 77532380463415.

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 25650618846736 + 25785789476841 = 5064644^2 + 5077971^2 .

It is a cyclic number.

It is not a de Polignac number, because 51436408323577 - 2¹⁵ = 51436408290809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51436408023577) 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, 14472819924 + ... + 14472823477.

It is an arithmetic number, because the mean of its divisors is an integer number (12866338492189).

Almost surely, 2^{51436408323577} is an apocalyptic number.

It is an amenable number.

51436408323577 is a deficient number, since it is larger than the sum of its proper divisors (28945645179).

51436408323577 is a wasteful number, since it uses less digits than its factorization.

51436408323577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28945645178.

The product of its (nonzero) digits is 50803200, while the sum is 58.

The spelling of 51436408323577 in words is "fifty-one trillion, four hundred thirty-six billion, four hundred eight million, three hundred twenty-three thousand, five hundred seventy-seven".