45243940417 has 4 divisors (see below), whose sum is σ = 48724243540. Its totient is φ = 41763637296.

The previous prime is 45243940411. The next prime is 45243940429. The reversal of 45243940417 is 71404934254.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28785872896 + 16458067521 = 169664^2 + 128289^2 .

It is a cyclic number.

It is not a de Polignac number, because 45243940417 - 2¹⁹ = 45243416129 is a prime.

It is a super-2 number, since 2×45243940417² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45243940411) 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, 1740151542 + ... + 1740151567.

It is an arithmetic number, because the mean of its divisors is an integer number (12181060885).

Almost surely, 2^45243940417 is an apocalyptic number.

It is an amenable number.

45243940417 is a deficient number, since it is larger than the sum of its proper divisors (3480303123).

45243940417 is a wasteful number, since it uses less digits than its factorization.

45243940417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3480303122.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 45243940417 in words is "forty-five billion, two hundred forty-three million, nine hundred forty thousand, four hundred seventeen".