51616217005220 has 72 divisors (see below), whose sum is σ = 126375675358464. Its totient is φ = 17657040483264.

The previous prime is 51616217005181. The next prime is 51616217005273. The reversal of 51616217005220 is 2250071261615.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59012372 + ... + 59880651.

It is an arithmetic number, because the mean of its divisors is an integer number (1755217713312).

Almost surely, 2^{51616217005220} is an apocalyptic number.

It is an amenable number.

51616217005220 is an abundant number, since it is smaller than the sum of its proper divisors (74759458353244).

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

51616217005220 is a wasteful number, since it uses less digits than its factorization.

51616217005220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118893489 (or 118893480 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

Adding to 51616217005220 its reverse (2250071261615), we get a palindrome (53866288266835).

The spelling of 51616217005220 in words is "fifty-one trillion, six hundred sixteen billion, two hundred seventeen million, five thousand, two hundred twenty".