1645098957 has 8 divisors (see below), whose sum is σ = 2437183680. Its totient is φ = 1096732620.

The previous prime is 1645098913. The next prime is 1645098967. The reversal of 1645098957 is 7598905461.

1645098957 is a `hidden beast` number, since 1 + 6 + 4 + 509 + 89 + 57 = 666.

It is not a de Polignac number, because 1645098957 - 2¹⁰ = 1645097933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645098967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30464769 + ... + 30464822.

It is an arithmetic number, because the mean of its divisors is an integer number (304647960).

Almost surely, 2^1645098957 is an apocalyptic number.

It is an amenable number.

1645098957 is a deficient number, since it is larger than the sum of its proper divisors (792084723).

1645098957 is an equidigital number, since it uses as much as digits as its factorization.

1645098957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60929600 (or 60929594 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The square root of 1645098957 is about 40559.8194892433. The cubic root of 1645098957 is about 1180.4946114267.

The spelling of 1645098957 in words is "one billion, six hundred forty-five million, ninety-eight thousand, nine hundred fifty-seven".