2687445864 has 96 divisors (see below), whose sum is σ = 7752282720. Its totient is φ = 871580736.

The previous prime is 2687445793. The next prime is 2687445889. The reversal of 2687445864 is 4685447862.

It is a happy number.

2687445864 is a `hidden beast` number, since 2 + 68 + 74 + 458 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2687445864.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53247 + ... + 90609.

It is an arithmetic number, because the mean of its divisors is an integer number (80752945).

Almost surely, 2^2687445864 is an apocalyptic number.

2687445864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2687445864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3876141360).

2687445864 is an abundant number, since it is smaller than the sum of its proper divisors (5064836856).

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

2687445864 is a wasteful number, since it uses less digits than its factorization.

2687445864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37421 (or 37405 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The square root of 2687445864 is about 51840.5812467414. The cubic root of 2687445864 is about 1390.3151061749.

The spelling of 2687445864 in words is "two billion, six hundred eighty-seven million, four hundred forty-five thousand, eight hundred sixty-four".