215735729740 has 12 divisors (see below), whose sum is σ = 453045032496. Its totient is φ = 86294291888.

The previous prime is 215735729681. The next prime is 215735729743. The reversal of 215735729740 is 47927537512.

It is not an unprimeable number, because it can be changed into a prime (215735729743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5393393224 + ... + 5393393263.

It is an arithmetic number, because the mean of its divisors is an integer number (37753752708).

Almost surely, 2^215735729740 is an apocalyptic number.

215735729740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215735729740 is an abundant number, since it is smaller than the sum of its proper divisors (237309302756).

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

215735729740 is a wasteful number, since it uses less digits than its factorization.

215735729740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10786786496 (or 10786786494 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 215735729740 in words is "two hundred fifteen billion, seven hundred thirty-five million, seven hundred twenty-nine thousand, seven hundred forty".