36083557781 has 4 divisors (see below), whose sum is σ = 36084008364. Its totient is φ = 36083107200.

The previous prime is 36083557759. The next prime is 36083557787. The reversal of 36083557781 is 18775538063.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28647255025 + 7436302756 = 169255^2 + 86234^2 .

It is a cyclic number.

It is not a de Polignac number, because 36083557781 - 2²² = 36079363477 is a prime.

It is a super-2 number, since 2×36083557781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36083557787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69050 + ... + 277371.

It is an arithmetic number, because the mean of its divisors is an integer number (9021002091).

Almost surely, 2^36083557781 is an apocalyptic number.

It is an amenable number.

36083557781 is a deficient number, since it is larger than the sum of its proper divisors (450583).

36083557781 is a wasteful number, since it uses less digits than its factorization.

36083557781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450582.

The product of its (nonzero) digits is 4233600, while the sum is 53.

The spelling of 36083557781 in words is "thirty-six billion, eighty-three million, five hundred fifty-seven thousand, seven hundred eighty-one".