2158475660 has 48 divisors (see below), whose sum is σ = 5078535840. Its totient is φ = 763683840.

The previous prime is 2158475659. The next prime is 2158475663. The reversal of 2158475660 is 665748512.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (2158475663) 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, 124445 + ... + 140724.

It is an arithmetic number, because the mean of its divisors is an integer number (105802830).

Almost surely, 2^2158475660 is an apocalyptic number.

2158475660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2158475660 is an abundant number, since it is smaller than the sum of its proper divisors (2920060180).

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

2158475660 is a wasteful number, since it uses less digits than its factorization.

2158475660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265226 (or 265224 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 2158475660 is about 46459.3979728537. The cubic root of 2158475660 is about 1292.3566599617.

The spelling of 2158475660 in words is "two billion, one hundred fifty-eight million, four hundred seventy-five thousand, six hundred sixty".