45391987477 has 4 divisors (see below), whose sum is σ = 45399730176. Its totient is φ = 45384244780.

The previous prime is 45391987447. The next prime is 45391987493. The reversal of 45391987477 is 77478919354.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 45391987477 - 2¹⁵ = 45391954709 is a prime.

It is a super-2 number, since 2×45391987477² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45391987447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3862549 + ... + 3874282.

It is an arithmetic number, because the mean of its divisors is an integer number (11349932544).

Almost surely, 2^45391987477 is an apocalyptic number.

It is an amenable number.

45391987477 is a deficient number, since it is larger than the sum of its proper divisors (7742699).

45391987477 is an equidigital number, since it uses as much as digits as its factorization.

45391987477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7742698.

The product of its digits is 53343360, while the sum is 64.

The spelling of 45391987477 in words is "forty-five billion, three hundred ninety-one million, nine hundred eighty-seven thousand, four hundred seventy-seven".