20614657615577 has 2 divisors, whose sum is σ = 20614657615578. Its totient is φ = 20614657615576.

The previous prime is 20614657615567. The next prime is 20614657615597. The reversal of 20614657615577 is 77551675641602.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12992773493401 + 7621884122176 = 3604549^2 + 2760776^2 .

It is a cyclic number.

It is not a de Polignac number, because 20614657615577 - 2¹² = 20614657611481 is a prime.

It is a super-2 number, since 2×20614657615577² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20614657615567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10307328807788 + 10307328807789.

It is an arithmetic number, because the mean of its divisors is an integer number (10307328807789).

Almost surely, 2^{20614657615577} is an apocalyptic number.

It is an amenable number.

20614657615577 is a deficient number, since it is larger than the sum of its proper divisors (1).

20614657615577 is an equidigital number, since it uses as much as digits as its factorization.

20614657615577 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74088000, while the sum is 62.

The spelling of 20614657615577 in words is "twenty trillion, six hundred fourteen billion, six hundred fifty-seven million, six hundred fifteen thousand, five hundred seventy-seven".