64401902 has 4 divisors (see below), whose sum is σ = 96602856. Its totient is φ = 32200950.

The previous prime is 64401901. The next prime is 64401907. The reversal of 64401902 is 20910446.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64401901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16100474 + ... + 16100477.

It is an arithmetic number, because the mean of its divisors is an integer number (24150714).

Almost surely, 2^64401902 is an apocalyptic number.

64401902 is a deficient number, since it is larger than the sum of its proper divisors (32200954).

64401902 is a wasteful number, since it uses less digits than its factorization.

64401902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32200953.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 64401902 is about 8025.0795634685. The cubic root of 64401902 is about 400.8355492616.

The spelling of 64401902 in words is "sixty-four million, four hundred one thousand, nine hundred two".