2777640002640 has 60 divisors (see below), whose sum is σ = 9328241011284. Its totient is φ = 740704000512.

The previous prime is 2777640002603. The next prime is 2777640002677. The reversal of 2777640002640 is 462000467772.

It is an interprime number because it is at equal distance from previous prime (2777640002603) and next prime (2777640002677).

It can be written as a sum of positive squares in 2 ways, for example, as 2176946800704 + 600693201936 = 1475448^2 + 775044^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1928915949 + ... + 1928917388.

Almost surely, 2^{2777640002640} is an apocalyptic number.

2777640002640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2777640002640 is an abundant number, since it is smaller than the sum of its proper divisors (6550601008644).

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

2777640002640 is a wasteful number, since it uses less digits than its factorization.

2777640002640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3857833356 (or 3857833347 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 45.

The spelling of 2777640002640 in words is "two trillion, seven hundred seventy-seven billion, six hundred forty million, two thousand, six hundred forty".