2077785556645 has 8 divisors (see below), whose sum is σ = 2493522038304. Its totient is φ = 1662108865104.

The previous prime is 2077785556633. The next prime is 2077785556667. The reversal of 2077785556645 is 5466555877702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2077785556645 - 2¹¹ = 2077785554597 is a prime.

It is a Duffinian number.

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, 14871039 + ... + 15010108.

It is an arithmetic number, because the mean of its divisors is an integer number (311690254788).

Almost surely, 2^{2077785556645} is an apocalyptic number.

It is an amenable number.

2077785556645 is a deficient number, since it is larger than the sum of its proper divisors (415736481659).

2077785556645 is a wasteful number, since it uses less digits than its factorization.

2077785556645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29895059.

The product of its (nonzero) digits is 493920000, while the sum is 67.

The spelling of 2077785556645 in words is "two trillion, seventy-seven billion, seven hundred eighty-five million, five hundred fifty-six thousand, six hundred forty-five".