51407889189220 has 48 divisors (see below), whose sum is σ = 113646538736640. Its totient is φ = 19479504865536.

The previous prime is 51407889189211. The next prime is 51407889189233. The reversal of 51407889189220 is 2298198870415.

It is a super-2 number, since 2×51407889189220² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 591624 + ... + 10157056.

It is an arithmetic number, because the mean of its divisors is an integer number (2367636223680).

Almost surely, 2^{51407889189220} is an apocalyptic number.

It is an amenable number.

51407889189220 is an abundant number, since it is smaller than the sum of its proper divisors (62238649547420).

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

51407889189220 is a wasteful number, since it uses less digits than its factorization.

51407889189220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9579604 (or 9579602 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 64.

The spelling of 51407889189220 in words is "fifty-one trillion, four hundred seven billion, eight hundred eighty-nine million, one hundred eighty-nine thousand, two hundred twenty".