215087681040 has 80 divisors (see below), whose sum is σ = 668051991936. Its totient is φ = 57246592000.

The previous prime is 215087681009. The next prime is 215087681047. The reversal of 215087681040 is 40186780512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 215087680983 and 215087681001.

It is not an unprimeable number, because it can be changed into a prime (215087681047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 735036 + ... + 985115.

Almost surely, 2^215087681040 is an apocalyptic number.

215087681040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215087681040 is an abundant number, since it is smaller than the sum of its proper divisors (452964310896).

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

215087681040 is a wasteful number, since it uses less digits than its factorization.

215087681040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1720688 (or 1720682 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 215087681040 in words is "two hundred fifteen billion, eighty-seven million, six hundred eighty-one thousand, forty".