51150505405 has 4 divisors (see below), whose sum is σ = 61380606492. Its totient is φ = 40920404320.

The previous prime is 51150505387. The next prime is 51150505411. The reversal of 51150505405 is 50450505115.

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 36761543289 + 14388962116 = 191733^2 + 119954^2 .

It is not a de Polignac number, because 51150505405 - 2⁷ = 51150505277 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, 5115050536 + ... + 5115050545.

It is an arithmetic number, because the mean of its divisors is an integer number (15345151623).

Almost surely, 2^51150505405 is an apocalyptic number.

It is an amenable number.

51150505405 is a deficient number, since it is larger than the sum of its proper divisors (10230101087).

51150505405 is a wasteful number, since it uses less digits than its factorization.

51150505405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230101086.

The product of its (nonzero) digits is 12500, while the sum is 31.

The spelling of 51150505405 in words is "fifty-one billion, one hundred fifty million, five hundred five thousand, four hundred five".