64198187901 has 40 divisors (see below), whose sum is σ = 98783733048. Its totient is φ = 41523840000.

The previous prime is 64198187827. The next prime is 64198187953. The reversal of 64198187901 is 10978189146.

It can be written as a sum of positive squares in 4 ways, for example, as 9820611801 + 54377576100 = 99099^2 + 233190^2 .

It is not a de Polignac number, because 64198187901 - 2²³ = 64189799293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64198187101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 547701 + ... + 654501.

Almost surely, 2^64198187901 is an apocalyptic number.

It is an amenable number.

64198187901 is a deficient number, since it is larger than the sum of its proper divisors (34585545147).

64198187901 is a wasteful number, since it uses less digits than its factorization.

64198187901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107035 (or 107026 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 54.

The spelling of 64198187901 in words is "sixty-four billion, one hundred ninety-eight million, one hundred eighty-seven thousand, nine hundred one".