42198897107491 has 2 divisors, whose sum is σ = 42198897107492. Its totient is φ = 42198897107490.

The previous prime is 42198897107473. The next prime is 42198897107581. The reversal of 42198897107491 is 19470179889124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42198897107491 - 2²⁷ = 42198762889763 is a prime.

It is a super-2 number, since 2×42198897107491² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42198897107491.

It is not a weakly prime, because it can be changed into another prime (42198897107891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21099448553745 + 21099448553746.

It is an arithmetic number, because the mean of its divisors is an integer number (21099448553746).

Almost surely, 2^{42198897107491} is an apocalyptic number.

42198897107491 is a deficient number, since it is larger than the sum of its proper divisors (1).

42198897107491 is an equidigital number, since it uses as much as digits as its factorization.

42198897107491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73156608, while the sum is 70.

The spelling of 42198897107491 in words is "forty-two trillion, one hundred ninety-eight billion, eight hundred ninety-seven million, one hundred seven thousand, four hundred ninety-one".