1653316945 has 16 divisors (see below), whose sum is σ = 2274150528. Its totient is φ = 1130330880.

The previous prime is 1653316919. The next prime is 1653316957. The reversal of 1653316945 is 5496133561.

It is a happy number.

It is not a de Polignac number, because 1653316945 - 2⁷ = 1653316817 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58291 + ... + 81880.

It is an arithmetic number, because the mean of its divisors is an integer number (142134408).

Almost surely, 2^1653316945 is an apocalyptic number.

It is an amenable number.

1653316945 is a deficient number, since it is larger than the sum of its proper divisors (620833583).

1653316945 is a wasteful number, since it uses less digits than its factorization.

1653316945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140520.

The product of its digits is 291600, while the sum is 43.

The square root of 1653316945 is about 40661.0002951231. Note that the first 3 decimals coincide. The cubic root of 1653316945 is about 1182.4570427505.

The spelling of 1653316945 in words is "one billion, six hundred fifty-three million, three hundred sixteen thousand, nine hundred forty-five".