3815161901 has 2 divisors, whose sum is σ = 3815161902. Its totient is φ = 3815161900.

The previous prime is 3815161891. The next prime is 3815161937. The reversal of 3815161901 is 1091615183.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3011155876 + 804006025 = 54874^2 + 28355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3815161901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3815161001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1907580950 + 1907580951.

It is an arithmetic number, because the mean of its divisors is an integer number (1907580951).

Almost surely, 2^3815161901 is an apocalyptic number.

It is an amenable number.

3815161901 is a deficient number, since it is larger than the sum of its proper divisors (1).

3815161901 is an equidigital number, since it uses as much as digits as its factorization.

3815161901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 3815161901 is about 61766.9968591642. The cubic root of 3815161901 is about 1562.5634356411.

The spelling of 3815161901 in words is "three billion, eight hundred fifteen million, one hundred sixty-one thousand, nine hundred one".