2158970685 has 32 divisors (see below), whose sum is σ = 3616583040. Its totient is φ = 1098332928.

The previous prime is 2158970677. The next prime is 2158970707. The reversal of 2158970685 is 5860798512.

2158970685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2158970685 - 2³ = 2158970677 is a prime.

It is a super-2 number, since 2×2158970685² = 9322308837378738450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6207 + ... + 66003.

It is an arithmetic number, because the mean of its divisors is an integer number (113018220).

Almost surely, 2^2158970685 is an apocalyptic number.

It is an amenable number.

2158970685 is a deficient number, since it is larger than the sum of its proper divisors (1457612355).

2158970685 is a wasteful number, since it uses less digits than its factorization.

2158970685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59917.

The product of its (nonzero) digits is 1209600, while the sum is 51.

The square root of 2158970685 is about 46464.7251686696. The cubic root of 2158970685 is about 1292.4554488071.

The spelling of 2158970685 in words is "two billion, one hundred fifty-eight million, nine hundred seventy thousand, six hundred eighty-five".