2158107540 has 48 divisors (see below), whose sum is σ = 6046389888. Its totient is φ = 575144064.

The previous prime is 2158107509. The next prime is 2158107557. The reversal of 2158107540 is 457018512.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 96894 + ... + 117066.

It is an arithmetic number, because the mean of its divisors is an integer number (125966456).

Almost surely, 2^2158107540 is an apocalyptic number.

2158107540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2158107540 is an abundant number, since it is smaller than the sum of its proper divisors (3888282348).

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

2158107540 is a wasteful number, since it uses less digits than its factorization.

2158107540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21968 (or 21966 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 2158107540 is about 46455.4360651151. The cubic root of 2158107540 is about 1292.2831869099.

The spelling of 2158107540 in words is "two billion, one hundred fifty-eight million, one hundred seven thousand, five hundred forty".