64621670401 has 4 divisors (see below), whose sum is σ = 64622830000. Its totient is φ = 64620510804.

The previous prime is 64621670371. The next prime is 64621670411. The reversal of 64621670401 is 10407612646.

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 a de Polignac number, because none of the positive numbers 2^k-64621670401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64621670411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491751 + ... + 609148.

It is an arithmetic number, because the mean of its divisors is an integer number (16155707500).

Almost surely, 2^64621670401 is an apocalyptic number.

It is an amenable number.

64621670401 is a deficient number, since it is larger than the sum of its proper divisors (1159599).

64621670401 is a wasteful number, since it uses less digits than its factorization.

64621670401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159598.

The product of its (nonzero) digits is 48384, while the sum is 37.

It can be divided in two parts, 646216 and 70401, that added together give a palindrome (716617).

The spelling of 64621670401 in words is "sixty-four billion, six hundred twenty-one million, six hundred seventy thousand, four hundred one".