45009698621 has 4 divisors (see below), whose sum is σ = 45408014652. Its totient is φ = 44611382592.

The previous prime is 45009698537. The next prime is 45009698647. The reversal of 45009698621 is 12689690054.

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 4171351396 + 40838347225 = 64586^2 + 202085^2 .

It is a cyclic number.

It is not a de Polignac number, because 45009698621 - 2¹⁸ = 45009436477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 45009698621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45009698021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199157846 + ... + 199158071.

It is an arithmetic number, because the mean of its divisors is an integer number (11352003663).

Almost surely, 2^45009698621 is an apocalyptic number.

It is an amenable number.

45009698621 is a deficient number, since it is larger than the sum of its proper divisors (398316031).

45009698621 is a wasteful number, since it uses less digits than its factorization.

45009698621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398316030.

The product of its (nonzero) digits is 933120, while the sum is 50.

The spelling of 45009698621 in words is "forty-five billion, nine million, six hundred ninety-eight thousand, six hundred twenty-one".