2158741764 has 36 divisors (see below), whose sum is σ = 5604304524. Its totient is φ = 700132032.

The previous prime is 2158741763. The next prime is 2158741769. The reversal of 2158741764 is 4671478512.

2158741764 is a `hidden beast` number, since 2 + 1 + 587 + 4 + 1 + 7 + 64 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1513988100 + 644753664 = 38910^2 + 25392^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2158741763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 809007 + ... + 811670.

Almost surely, 2^2158741764 is an apocalyptic number.

It is an amenable number.

2158741764 is an abundant number, since it is smaller than the sum of its proper divisors (3445562760).

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

2158741764 is a wasteful number, since it uses less digits than its factorization.

2158741764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620724 (or 1620719 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 2158741764 is about 46462.2617185173. The cubic root of 2158741764 is about 1292.4097664435.

The spelling of 2158741764 in words is "two billion, one hundred fifty-eight million, seven hundred forty-one thousand, seven hundred sixty-four".