51143503634 has 4 divisors (see below), whose sum is σ = 76715255454. Its totient is φ = 25571751816.

The previous prime is 51143503573. The next prime is 51143503657. The reversal of 51143503634 is 43630534115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33250428409 + 17893075225 = 182347^2 + 133765^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51143503594 and 51143503603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12785875907 + ... + 12785875910.

Almost surely, 2^51143503634 is an apocalyptic number.

51143503634 is a deficient number, since it is larger than the sum of its proper divisors (25571751820).

51143503634 is a wasteful number, since it uses less digits than its factorization.

51143503634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25571751819.

The product of its (nonzero) digits is 64800, while the sum is 35.

The spelling of 51143503634 in words is "fifty-one billion, one hundred forty-three million, five hundred three thousand, six hundred thirty-four".