51140204405 has 4 divisors (see below), whose sum is σ = 61368245292. Its totient is φ = 40912163520.

The previous prime is 51140204393. The next prime is 51140204443. The reversal of 51140204405 is 50440204115.

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 17287516324 + 33852688081 = 131482^2 + 183991^2 .

It is not a de Polignac number, because 51140204405 - 2³⁰ = 50066462581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114020436 + ... + 5114020445.

It is an arithmetic number, because the mean of its divisors is an integer number (15342061323).

Almost surely, 2^51140204405 is an apocalyptic number.

It is an amenable number.

51140204405 is a deficient number, since it is larger than the sum of its proper divisors (10228040887).

51140204405 is a wasteful number, since it uses less digits than its factorization.

51140204405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10228040886.

The product of its (nonzero) digits is 3200, while the sum is 26.

The spelling of 51140204405 in words is "fifty-one billion, one hundred forty million, two hundred four thousand, four hundred five".