51967157597 has 4 divisors (see below), whose sum is σ = 51970534236. Its totient is φ = 51963780960.

The previous prime is 51967157573. The next prime is 51967157629. The reversal of 51967157597 is 79575176915.

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 20801139076 + 31166018521 = 144226^2 + 176539^2 .

It is a cyclic number.

It is not a de Polignac number, because 51967157597 - 2⁶ = 51967157533 is a prime.

It is a super-2 number, since 2×51967157597² (a number of 22 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 (51967157537) 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, 1665128 + ... + 1696049.

It is an arithmetic number, because the mean of its divisors is an integer number (12992633559).

Almost surely, 2^51967157597 is an apocalyptic number.

It is an amenable number.

51967157597 is a deficient number, since it is larger than the sum of its proper divisors (3376639).

51967157597 is a wasteful number, since it uses less digits than its factorization.

51967157597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3376638.

The product of its digits is 20837250, while the sum is 62.

The spelling of 51967157597 in words is "fifty-one billion, nine hundred sixty-seven million, one hundred fifty-seven thousand, five hundred ninety-seven".