64410991 has 8 divisors (see below), whose sum is σ = 65966400. Its totient is φ = 62874240.

The previous prime is 64410979. The next prime is 64411003. The reversal of 64410991 is 19901446.

It is an interprime number because it is at equal distance from previous prime (64410979) and next prime (64411003).

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

It is a cyclic number.

It is not a de Polignac number, because 64410991 - 2²³ = 56022383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64410911) 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, 2451 + ... + 11611.

It is an arithmetic number, because the mean of its divisors is an integer number (8245800).

Almost surely, 2^64410991 is an apocalyptic number.

64410991 is a deficient number, since it is larger than the sum of its proper divisors (1555409).

64410991 is an equidigital number, since it uses as much as digits as its factorization.

64410991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9329.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 64410991 is about 8025.6458307104. The cubic root of 64410991 is about 400.8544049311.

The spelling of 64410991 in words is "sixty-four million, four hundred ten thousand, nine hundred ninety-one".