51177967257 has 4 divisors (see below), whose sum is σ = 68237289680. Its totient is φ = 34118644836.

The previous prime is 51177967231. The next prime is 51177967259. The reversal of 51177967257 is 75276977115.

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 not a de Polignac number, because 51177967257 - 2¹⁹ = 51177442969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51177967197 and 51177967206.

It is not an unprimeable number, because it can be changed into a prime (51177967259) 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, 8529661207 + ... + 8529661212.

It is an arithmetic number, because the mean of its divisors is an integer number (17059322420).

Almost surely, 2^51177967257 is an apocalyptic number.

It is an amenable number.

51177967257 is a deficient number, since it is larger than the sum of its proper divisors (17059322423).

51177967257 is a wasteful number, since it uses less digits than its factorization.

51177967257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17059322422.

The product of its digits is 6482700, while the sum is 57.

The spelling of 51177967257 in words is "fifty-one billion, one hundred seventy-seven million, nine hundred sixty-seven thousand, two hundred fifty-seven".