215734957873 has 16 divisors (see below), whose sum is σ = 230336568000. Its totient is φ = 201477108672.

The previous prime is 215734957861. The next prime is 215734957957. The reversal of 215734957873 is 378759437512.

It is a cyclic number.

It is not a de Polignac number, because 215734957873 - 2³⁷ = 78296004401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215734957853) 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, 143598 + ... + 672376.

It is an arithmetic number, because the mean of its divisors is an integer number (14396035500).

Almost surely, 2^215734957873 is an apocalyptic number.

It is an amenable number.

215734957873 is a deficient number, since it is larger than the sum of its proper divisors (14601610127).

215734957873 is a wasteful number, since it uses less digits than its factorization.

215734957873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529104.

The product of its digits is 44452800, while the sum is 61.

The spelling of 215734957873 in words is "two hundred fifteen billion, seven hundred thirty-four million, nine hundred fifty-seven thousand, eight hundred seventy-three".