90198774849371 has 2 divisors, whose sum is σ = 90198774849372. Its totient is φ = 90198774849370.

The previous prime is 90198774849367. The next prime is 90198774849389. The reversal of 90198774849371 is 17394847789109.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90198774849371 - 2² = 90198774849367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90198774849292 and 90198774849301.

It is not a weakly prime, because it can be changed into another prime (90198771849371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45099387424685 + 45099387424686.

It is an arithmetic number, because the mean of its divisors is an integer number (45099387424686).

Almost surely, 2^{90198774849371} is an apocalyptic number.

90198774849371 is a deficient number, since it is larger than the sum of its proper divisors (1).

90198774849371 is an equidigital number, since it uses as much as digits as its factorization.

90198774849371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768144384, while the sum is 77.

The spelling of 90198774849371 in words is "ninety trillion, one hundred ninety-eight billion, seven hundred seventy-four million, eight hundred forty-nine thousand, three hundred seventy-one".