215837085451768 has 32 divisors (see below), whose sum is σ = 441491105070000. Its totient is φ = 98106397768960.

The previous prime is 215837085451763. The next prime is 215837085451807. The reversal of 215837085451768 is 867154580738512.

It is a junction number, because it is equal to n+sod(n) for n = 215837085451697 and 215837085451706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215837085451763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10745683 + ... + 23391106.

Almost surely, 2^{215837085451768} is an apocalyptic number.

It is an amenable number.

215837085451768 is an abundant number, since it is smaller than the sum of its proper divisors (225654019618232).

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

215837085451768 is a wasteful number, since it uses less digits than its factorization.

215837085451768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34208655 (or 34208651 counting only the distinct ones).

The product of its (nonzero) digits is 451584000, while the sum is 70.

The spelling of 215837085451768 in words is "two hundred fifteen trillion, eight hundred thirty-seven billion, eighty-five million, four hundred fifty-one thousand, seven hundred sixty-eight".