9045219902 has 4 divisors (see below), whose sum is σ = 13567829856. Its totient is φ = 4522609950.

The previous prime is 9045219863. The next prime is 9045219917. The reversal of 9045219902 is 2099125409.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2099125409 = 8737 ⋅240257.

It is a self number, because there is not a number n which added to its sum of digits gives 9045219902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2261304974 + ... + 2261304977.

It is an arithmetic number, because the mean of its divisors is an integer number (3391957464).

Almost surely, 2^9045219902 is an apocalyptic number.

9045219902 is a deficient number, since it is larger than the sum of its proper divisors (4522609954).

9045219902 is a wasteful number, since it uses less digits than its factorization.

9045219902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522609953.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 9045219902 is about 95106.3609965180. The cubic root of 9045219902 is about 2083.5617523175.

The spelling of 9045219902 in words is "nine billion, forty-five million, two hundred nineteen thousand, nine hundred two".