2770643640 has 32 divisors (see below), whose sum is σ = 8311931280. Its totient is φ = 738838272.

The previous prime is 2770643633. The next prime is 2770643683. The reversal of 2770643640 is 463460772.

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, 11544229 + ... + 11544468.

Almost surely, 2^2770643640 is an apocalyptic number.

2770643640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2770643640 is an abundant number, since it is smaller than the sum of its proper divisors (5541287640).

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

2770643640 is a wasteful number, since it uses less digits than its factorization.

2770643640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23088711 (or 23088707 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 39.

The square root of 2770643640 is about 52636.9037843223. The cubic root of 2770643640 is about 1404.5166441408.

The spelling of 2770643640 in words is "two billion, seven hundred seventy million, six hundred forty-three thousand, six hundred forty".