45277178981 has 4 divisors (see below), whose sum is σ = 45277604832. Its totient is φ = 45276753132.

The previous prime is 45277178897. The next prime is 45277178987. The reversal of 45277178981 is 18987177254.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45277178981 - 2²² = 45272984677 is a prime.

It is a super-2 number, since 2×45277178981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45277178981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45277178987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94856 + ... + 315518.

It is an arithmetic number, because the mean of its divisors is an integer number (11319401208).

Almost surely, 2^45277178981 is an apocalyptic number.

It is an amenable number.

45277178981 is a deficient number, since it is larger than the sum of its proper divisors (425851).

45277178981 is a wasteful number, since it uses less digits than its factorization.

45277178981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425850.

The product of its digits is 7902720, while the sum is 59.

The spelling of 45277178981 in words is "forty-five billion, two hundred seventy-seven million, one hundred seventy-eight thousand, nine hundred eighty-one".