10621808541677 has 2 divisors, whose sum is σ = 10621808541678. Its totient is φ = 10621808541676.

The previous prime is 10621808541661. The next prime is 10621808541733. The reversal of 10621808541677 is 77614580812601.

It is an a-pointer prime, because the next prime (10621808541733) can be obtained adding 10621808541677 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9938451705961 + 683356835716 = 3152531^2 + 826654^2 .

It is a cyclic number.

It is not a de Polignac number, because 10621808541677 - 2⁴ = 10621808541661 is a prime.

It is a super-2 number, since 2×10621808541677² (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 (10621808541077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5310904270838 + 5310904270839.

It is an arithmetic number, because the mean of its divisors is an integer number (5310904270839).

Almost surely, 2^{10621808541677} is an apocalyptic number.

It is an amenable number.

10621808541677 is a deficient number, since it is larger than the sum of its proper divisors (1).

10621808541677 is an equidigital number, since it uses as much as digits as its factorization.

10621808541677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 10621808541677 in words is "ten trillion, six hundred twenty-one billion, eight hundred eight million, five hundred forty-one thousand, six hundred seventy-seven".