215628201121783 has 16 divisors (see below), whose sum is σ = 218877771132000. Its totient is φ = 212386642707456.

The previous prime is 215628201121733. The next prime is 215628201121847. The reversal of 215628201121783 is 387121102826512.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215628201121783 is a prime.

It is a super-2 number, since 2×215628201121783² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215628201121733) 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, 3343092468 + ... + 3343156966.

It is an arithmetic number, because the mean of its divisors is an integer number (13679860695750).

Almost surely, 2^{215628201121783} is an apocalyptic number.

215628201121783 is a deficient number, since it is larger than the sum of its proper divisors (3249570010217).

215628201121783 is an equidigital number, since it uses as much as digits as its factorization.

215628201121783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125826.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 215628201121783 in words is "two hundred fifteen trillion, six hundred twenty-eight billion, two hundred one million, one hundred twenty-one thousand, seven hundred eighty-three".