64943198025 has 12 divisors (see below), whose sum is σ = 107372754192. Its totient is φ = 34636372240.

The previous prime is 64943198017. The next prime is 64943198029. The reversal of 64943198025 is 52089134946.

It is not a de Polignac number, because 64943198025 - 2³ = 64943198017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64943198029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432954579 + ... + 432954728.

It is an arithmetic number, because the mean of its divisors is an integer number (8947729516).

Almost surely, 2^64943198025 is an apocalyptic number.

It is an amenable number.

64943198025 is a deficient number, since it is larger than the sum of its proper divisors (42429556167).

64943198025 is a wasteful number, since it uses less digits than its factorization.

64943198025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865909320 (or 865909315 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 64943198025 in words is "sixty-four billion, nine hundred forty-three million, one hundred ninety-eight thousand, twenty-five".