20077602126557 has 2 divisors, whose sum is σ = 20077602126558. Its totient is φ = 20077602126556.

The previous prime is 20077602126509. The next prime is 20077602126643. The reversal of 20077602126557 is 75562120677002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13531649174521 + 6545952952036 = 3678539^2 + 2558506^2 .

It is a cyclic number.

It is not a de Polignac number, because 20077602126557 - 2²⁰ = 20077601077981 is a prime.

It is a super-2 number, since 2×20077602126557² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20077602126157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10038801063278 + 10038801063279.

It is an arithmetic number, because the mean of its divisors is an integer number (10038801063279).

Almost surely, 2^{20077602126557} is an apocalyptic number.

It is an amenable number.

20077602126557 is a deficient number, since it is larger than the sum of its proper divisors (1).

20077602126557 is an equidigital number, since it uses as much as digits as its factorization.

20077602126557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 20077602126557 in words is "twenty trillion, seventy-seven billion, six hundred two million, one hundred twenty-six thousand, five hundred fifty-seven".