51421269944 has 32 divisors (see below), whose sum is σ = 105518125440. Its totient is φ = 23298136800.

The previous prime is 51421269937. The next prime is 51421269953. The reversal of 51421269944 is 44996212415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 912074 + ... + 966809.

It is an arithmetic number, because the mean of its divisors is an integer number (3297441420).

Almost surely, 2^51421269944 is an apocalyptic number.

It is an amenable number.

51421269944 is an abundant number, since it is smaller than the sum of its proper divisors (54096855496).

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

51421269944 is a wasteful number, since it uses less digits than its factorization.

51421269944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879211 (or 1879207 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The spelling of 51421269944 in words is "fifty-one billion, four hundred twenty-one million, two hundred sixty-nine thousand, nine hundred forty-four".