2771061820 has 24 divisors (see below), whose sum is σ = 5838197904. Its totient is φ = 1104811776.

The previous prime is 2771061809. The next prime is 2771061841. The reversal of 2771061820 is 281601772.

It is a happy number.

It is a super-2 number, since 2×2771061820² = 15357567220523424800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

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, 219517 + ... + 231796.

It is an arithmetic number, because the mean of its divisors is an integer number (243258246).

Almost surely, 2^2771061820 is an apocalyptic number.

2771061820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2771061820 is an abundant number, since it is smaller than the sum of its proper divisors (3067136084).

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

2771061820 is a wasteful number, since it uses less digits than its factorization.

2771061820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451629 (or 451627 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 2771061820 is about 52640.8759425601. The cubic root of 2771061820 is about 1404.5873029599.

It can be divided in two parts, 277106 and 1820, that multiplied together give a triangular number (504332920 = T₃₁₇₅₉).

The spelling of 2771061820 in words is "two billion, seven hundred seventy-one million, sixty-one thousand, eight hundred twenty".