2765320640 has 56 divisors (see below), whose sum is σ = 6972281712. Its totient is φ = 1041059840.

The previous prime is 2765320631. The next prime is 2765320673. The reversal of 2765320640 is 460235672.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2765320640.

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, 248726 + ... + 259605.

Almost surely, 2^2765320640 is an apocalyptic number.

2765320640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2765320640 is an abundant number, since it is smaller than the sum of its proper divisors (4206961072).

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

2765320640 is a wasteful number, since it uses less digits than its factorization.

2765320640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508365 (or 508355 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 2765320640 is about 52586.3160907854. The cubic root of 2765320640 is about 1403.6166083842.

The spelling of 2765320640 in words is "two billion, seven hundred sixty-five million, three hundred twenty thousand, six hundred forty".