1645151497 has 8 divisors (see below), whose sum is σ = 1811177280. Its totient is φ = 1481870160.

The previous prime is 1645151483. The next prime is 1645151533. The reversal of 1645151497 is 7941515461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1645151497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1645151467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684853 + ... + 687250.

It is an arithmetic number, because the mean of its divisors is an integer number (226397160).

Almost surely, 2^1645151497 is an apocalyptic number.

It is an amenable number.

1645151497 is a deficient number, since it is larger than the sum of its proper divisors (166025783).

1645151497 is a wasteful number, since it uses less digits than its factorization.

1645151497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372223.

The product of its digits is 151200, while the sum is 43.

The square root of 1645151497 is about 40560.4671694003. The cubic root of 1645151497 is about 1180.5071785586.

The spelling of 1645151497 in words is "one billion, six hundred forty-five million, one hundred fifty-one thousand, four hundred ninety-seven".