38556892501861 has 2 divisors, whose sum is σ = 38556892501862. Its totient is φ = 38556892501860.

The previous prime is 38556892501849. The next prime is 38556892501909. The reversal of 38556892501861 is 16810529865583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26942639796900 + 11614252704961 = 5190630^2 + 3407969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38556892501861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38556892501801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19278446250930 + 19278446250931.

It is an arithmetic number, because the mean of its divisors is an integer number (19278446250931).

Almost surely, 2^{38556892501861} is an apocalyptic number.

It is an amenable number.

38556892501861 is a deficient number, since it is larger than the sum of its proper divisors (1).

38556892501861 is an equidigital number, since it uses as much as digits as its factorization.

38556892501861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416000, while the sum is 67.

The spelling of 38556892501861 in words is "thirty-eight trillion, five hundred fifty-six billion, eight hundred ninety-two million, five hundred one thousand, eight hundred sixty-one".