2623779656640 has 280 divisors, whose sum is σ = 9634321226112. Its totient is φ = 677104220160.

The previous prime is 2623779656633. The next prime is 2623779656647. The reversal of 2623779656640 is 466569773262.

2623779656640 is a `hidden beast` number, since 2 + 6 + 23 + 7 + 7 + 9 + 6 + 566 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (2623779656633) and next prime (2623779656647).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2623779656647) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 829159 + ... + 2436198.

Almost surely, 2^{2623779656640} is an apocalyptic number.

2623779656640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2623779656640 is an abundant number, since it is smaller than the sum of its proper divisors (7010541569472).

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

2623779656640 is a wasteful number, since it uses less digits than its factorization.

2623779656640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3265417 (or 3265398 counting only the distinct ones).

The product of its (nonzero) digits is 137168640, while the sum is 63.

The spelling of 2623779656640 in words is "two trillion, six hundred twenty-three billion, seven hundred seventy-nine million, six hundred fifty-six thousand, six hundred forty".