102036257581 has 2 divisors, whose sum is σ = 102036257582. Its totient is φ = 102036257580.

The previous prime is 102036257579. The next prime is 102036257591. The reversal of 102036257581 is 185752630201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101346722500 + 689535081 = 318350^2 + 26259^2 .

It is a cyclic number.

It is not a de Polignac number, because 102036257581 - 2¹ = 102036257579 is a prime.

It is a super-2 number, since 2×102036257581² (a number of 23 digits) contains 22 as substring.

Together with 102036257579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102036257501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51018128790 + 51018128791.

It is an arithmetic number, because the mean of its divisors is an integer number (51018128791).

Almost surely, 2^102036257581 is an apocalyptic number.

It is an amenable number.

102036257581 is a deficient number, since it is larger than the sum of its proper divisors (1).

102036257581 is an equidigital number, since it uses as much as digits as its factorization.

102036257581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

Adding to 102036257581 its reverse (185752630201), we get a palindrome (287788887782).

The spelling of 102036257581 in words is "one hundred two billion, thirty-six million, two hundred fifty-seven thousand, five hundred eighty-one".