51446139340 has 24 divisors (see below), whose sum is σ = 108224155872. Its totient is φ = 20542786560.

The previous prime is 51446139337. The next prime is 51446139359. The reversal of 51446139340 is 4393164415.

It is a junction number, because it is equal to n+sod(n) for n = 51446139293 and 51446139302.

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, 2217496 + ... + 2240575.

It is an arithmetic number, because the mean of its divisors is an integer number (4509339828).

Almost surely, 2^51446139340 is an apocalyptic number.

It is an amenable number.

51446139340 is an abundant number, since it is smaller than the sum of its proper divisors (56778016532).

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

51446139340 is a wasteful number, since it uses less digits than its factorization.

51446139340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4458657 (or 4458655 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 51446139340 in words is "fifty-one billion, four hundred forty-six million, one hundred thirty-nine thousand, three hundred forty".