1902073373581 has 2 divisors, whose sum is σ = 1902073373582. Its totient is φ = 1902073373580.

The previous prime is 1902073373549. The next prime is 1902073373593. The reversal of 1902073373581 is 1853733702091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 953144116681 + 948929256900 = 976291^2 + 974130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1902073373581 - 2⁵ = 1902073373549 is a prime.

It is a super-2 number, since 2×1902073373581² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1902073373531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 951036686790 + 951036686791.

It is an arithmetic number, because the mean of its divisors is an integer number (951036686791).

Almost surely, 2^{1902073373581} is an apocalyptic number.

It is an amenable number.

1902073373581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1902073373581 is an equidigital number, since it uses as much as digits as its factorization.

1902073373581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 1902073373581 in words is "one trillion, nine hundred two billion, seventy-three million, three hundred seventy-three thousand, five hundred eighty-one".