2158777734 has 16 divisors (see below), whose sum is σ = 4318939440. Its totient is φ = 719361920.

The previous prime is 2158777729. The next prime is 2158777741. The reversal of 2158777734 is 4377778512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36807 + ... + 75314.

It is an arithmetic number, because the mean of its divisors is an integer number (269933715).

Almost surely, 2^2158777734 is an apocalyptic number.

2158777734 is an abundant number, since it is smaller than the sum of its proper divisors (2160161706).

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

2158777734 is a wasteful number, since it uses less digits than its factorization.

2158777734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115335.

The product of its digits is 2304960, while the sum is 51.

The square root of 2158777734 is about 46462.6488052500. The cubic root of 2158777734 is about 1292.4169446560.

The spelling of 2158777734 in words is "two billion, one hundred fifty-eight million, seven hundred seventy-seven thousand, seven hundred thirty-four".