1945099908643 has 2 divisors, whose sum is σ = 1945099908644. Its totient is φ = 1945099908642.

The previous prime is 1945099908641. The next prime is 1945099908677. The reversal of 1945099908643 is 3468099905491.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1945099908643 - 2¹ = 1945099908641 is a prime.

It is a super-2 number, since 2×1945099908643² (a number of 25 digits) contains 22 as substring.

Together with 1945099908641, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1945099908641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972549954321 + 972549954322.

It is an arithmetic number, because the mean of its divisors is an integer number (972549954322).

Almost surely, 2^{1945099908643} is an apocalyptic number.

1945099908643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945099908643 is an equidigital number, since it uses as much as digits as its factorization.

1945099908643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75582720, while the sum is 67.

The spelling of 1945099908643 in words is "one trillion, nine hundred forty-five billion, ninety-nine million, nine hundred eight thousand, six hundred forty-three".