51953971609 has 16 divisors (see below), whose sum is σ = 55804826880. Its totient is φ = 48191915520.

The previous prime is 51953971603. The next prime is 51953971649. The reversal of 51953971609 is 90617935915.

It is a de Polignac number, because none of the positive numbers 2^k-51953971609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51953971609.

It is not an unprimeable number, because it can be changed into a prime (51953971603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4427452 + ... + 4439170.

It is an arithmetic number, because the mean of its divisors is an integer number (3487801680).

Almost surely, 2^51953971609 is an apocalyptic number.

It is an amenable number.

51953971609 is a deficient number, since it is larger than the sum of its proper divisors (3850855271).

51953971609 is a wasteful number, since it uses less digits than its factorization.

51953971609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15480.

The product of its (nonzero) digits is 2296350, while the sum is 55.

The spelling of 51953971609 in words is "fifty-one billion, nine hundred fifty-three million, nine hundred seventy-one thousand, six hundred nine".