945991183877 has 2 divisors, whose sum is σ = 945991183878. Its totient is φ = 945991183876.

The previous prime is 945991183853. The next prime is 945991183883. The reversal of 945991183877 is 778381199549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696280100356 + 249711083521 = 834434^2 + 499711^2 .

It is an emirp because it is prime and its reverse (778381199549) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 945991183877 - 2²² = 945986989573 is a prime.

It is a super-2 number, since 2×945991183877² (a number of 25 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 945991183877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (945991183817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 472995591938 + 472995591939.

It is an arithmetic number, because the mean of its divisors is an integer number (472995591939).

Almost surely, 2^945991183877 is an apocalyptic number.

It is an amenable number.

945991183877 is a deficient number, since it is larger than the sum of its proper divisors (1).

945991183877 is an equidigital number, since it uses as much as digits as its factorization.

945991183877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 71.

The spelling of 945991183877 in words is "nine hundred forty-five billion, nine hundred ninety-one million, one hundred eighty-three thousand, eight hundred seventy-seven".