64621941 has 8 divisors (see below), whose sum is σ = 86792064. Its totient is φ = 42766560.

The previous prime is 64621939. The next prime is 64621957. The reversal of 64621941 is 14912646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64621941 - 2¹ = 64621939 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64621961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78205 + ... + 79026.

It is an arithmetic number, because the mean of its divisors is an integer number (10849008).

Almost surely, 2^64621941 is an apocalyptic number.

It is an amenable number.

64621941 is a deficient number, since it is larger than the sum of its proper divisors (22170123).

64621941 is a wasteful number, since it uses less digits than its factorization.

64621941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157371.

The product of its digits is 10368, while the sum is 33.

The square root of 64621941 is about 8038.7773324057. Note that the first 3 decimals coincide. The cubic root of 64621941 is about 401.2915357668.

The spelling of 64621941 in words is "sixty-four million, six hundred twenty-one thousand, nine hundred forty-one".