51377020252637 has 4 divisors (see below), whose sum is σ = 51377558648640. Its totient is φ = 51376481856636.

The previous prime is 51377020252603. The next prime is 51377020252661. The reversal of 51377020252637 is 73625202077315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51377020252637 - 2⁴⁴ = 33784834208221 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 (51377020252697) 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, 269054837 + ... + 269245722.

It is an arithmetic number, because the mean of its divisors is an integer number (12844389662160).

Almost surely, 2^{51377020252637} is an apocalyptic number.

It is an amenable number.

51377020252637 is a deficient number, since it is larger than the sum of its proper divisors (538396003).

51377020252637 is an equidigital number, since it uses as much as digits as its factorization.

51377020252637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538396002.

The product of its (nonzero) digits is 3704400, while the sum is 50.

The spelling of 51377020252637 in words is "fifty-one trillion, three hundred seventy-seven billion, twenty million, two hundred fifty-two thousand, six hundred thirty-seven".