65426201993 has 4 divisors (see below), whose sum is σ = 65435594448. Its totient is φ = 65416809540.

The previous prime is 65426201987. The next prime is 65426202043. The reversal of 65426201993 is 39910262456.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65426201993 - 2¹² = 65426197897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65426201293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685771 + ... + 4699712.

It is an arithmetic number, because the mean of its divisors is an integer number (16358898612).

Almost surely, 2^65426201993 is an apocalyptic number.

It is an amenable number.

65426201993 is a deficient number, since it is larger than the sum of its proper divisors (9392455).

65426201993 is an equidigital number, since it uses as much as digits as its factorization.

65426201993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9392454.

The product of its (nonzero) digits is 699840, while the sum is 47.

The spelling of 65426201993 in words is "sixty-five billion, four hundred twenty-six million, two hundred one thousand, nine hundred ninety-three".