51974257597 has 4 divisors (see below), whose sum is σ = 51977289760. Its totient is φ = 51971225436.

The previous prime is 51974257561. The next prime is 51974257609. The reversal of 51974257597 is 79575247915.

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 51974257597 - 2¹⁹ = 51973733309 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 (51974257537) 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, 1490223 + ... + 1524700.

It is an arithmetic number, because the mean of its divisors is an integer number (12994322440).

Almost surely, 2^51974257597 is an apocalyptic number.

It is an amenable number.

51974257597 is a deficient number, since it is larger than the sum of its proper divisors (3032163).

51974257597 is a wasteful number, since it uses less digits than its factorization.

51974257597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3032162.

The product of its digits is 27783000, while the sum is 61.

The spelling of 51974257597 in words is "fifty-one billion, nine hundred seventy-four million, two hundred fifty-seven thousand, five hundred ninety-seven".