215637793140 has 96 divisors (see below), whose sum is σ = 752771948544. Its totient is φ = 44807852160.

The previous prime is 215637793117. The next prime is 215637793141. The reversal of 215637793140 is 41397736512.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 215637793140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215637793141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23332804 + ... + 23342043.

It is an arithmetic number, because the mean of its divisors is an integer number (7841374464).

Almost surely, 2^215637793140 is an apocalyptic number.

215637793140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215637793140 is an abundant number, since it is smaller than the sum of its proper divisors (537134155404).

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

215637793140 is a wasteful number, since it uses less digits than its factorization.

215637793140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46674877 (or 46674875 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 215637793140 in words is "two hundred fifteen billion, six hundred thirty-seven million, seven hundred ninety-three thousand, one hundred forty".