51140674261 has 4 divisors (see below), whose sum is σ = 51190862400. Its totient is φ = 51090486124.

The previous prime is 51140674259. The next prime is 51140674297. The reversal of 51140674261 is 16247604115.

51140674261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51140674261 - 2¹ = 51140674259 is a prime.

It is a super-2 number, since 2×51140674261² (a number of 22 digits) contains 22 as substring.

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 51140674261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140074261) 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, 25092541 + ... + 25094578.

It is an arithmetic number, because the mean of its divisors is an integer number (12797715600).

Almost surely, 2^51140674261 is an apocalyptic number.

It is an amenable number.

51140674261 is a deficient number, since it is larger than the sum of its proper divisors (50188139).

51140674261 is a wasteful number, since it uses less digits than its factorization.

51140674261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50188138.

The product of its (nonzero) digits is 40320, while the sum is 37.

The spelling of 51140674261 in words is "fifty-one billion, one hundred forty million, six hundred seventy-four thousand, two hundred sixty-one".