45078217217 has 4 divisors (see below), whose sum is σ = 49176236976. Its totient is φ = 40980197460.

The previous prime is 45078217213. The next prime is 45078217259. The reversal of 45078217217 is 71271287054.

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 45078217217 - 2² = 45078217213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45078217211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2049009863 + ... + 2049009884.

It is an arithmetic number, because the mean of its divisors is an integer number (12294059244).

Almost surely, 2^45078217217 is an apocalyptic number.

It is an amenable number.

45078217217 is a deficient number, since it is larger than the sum of its proper divisors (4098019759).

45078217217 is a wasteful number, since it uses less digits than its factorization.

45078217217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4098019758.

The product of its (nonzero) digits is 219520, while the sum is 44.

The spelling of 45078217217 in words is "forty-five billion, seventy-eight million, two hundred seventeen thousand, two hundred seventeen".