20616777542577 has 16 divisors (see below), whose sum is σ = 27909832798080. Its totient is φ = 13534587360000.

The previous prime is 20616777542539. The next prime is 20616777542579. The reversal of 20616777542577 is 77524577761602.

It is a happy number.

It is not a de Polignac number, because 20616777542577 - 2¹⁶ = 20616777477041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20616777542579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58202424 + ... + 58555577.

It is an arithmetic number, because the mean of its divisors is an integer number (1744364549880).

Almost surely, 2^{20616777542577} is an apocalyptic number.

It is an amenable number.

20616777542577 is a deficient number, since it is larger than the sum of its proper divisors (7293055255503).

20616777542577 is a wasteful number, since it uses less digits than its factorization.

20616777542577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116758904.

The product of its (nonzero) digits is 242020800, while the sum is 66.

The spelling of 20616777542577 in words is "twenty trillion, six hundred sixteen billion, seven hundred seventy-seven million, five hundred forty-two thousand, five hundred seventy-seven".