51536770446 has 64 divisors (see below), whose sum is σ = 121761239040. Its totient is φ = 14230702080.

The previous prime is 51536770357. The next prime is 51536770451. The reversal of 51536770446 is 64407763515.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51536770395 and 51536770404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 959470 + ... + 1011758.

It is an arithmetic number, because the mean of its divisors is an integer number (1902519360).

Almost surely, 2^51536770446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51536770446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60880619520).

51536770446 is an abundant number, since it is smaller than the sum of its proper divisors (70224468594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51536770446 is a wasteful number, since it uses less digits than its factorization.

51536770446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53089.

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 51536770446 in words is "fifty-one billion, five hundred thirty-six million, seven hundred seventy thousand, four hundred forty-six".