64150681 has 4 divisors (see below), whose sum is σ = 73315072. Its totient is φ = 54986292.

The previous prime is 64150663. The next prime is 64150693. The reversal of 64150681 is 18605146.

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 64150681 - 2¹³ = 64142489 is a prime.

It is a super-2 number, since 2×64150681² = 8230619745527522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64150601) 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, 4582185 + ... + 4582198.

It is an arithmetic number, because the mean of its divisors is an integer number (18328768).

Almost surely, 2^64150681 is an apocalyptic number.

It is an amenable number.

64150681 is a deficient number, since it is larger than the sum of its proper divisors (9164391).

64150681 is an equidigital number, since it uses as much as digits as its factorization.

64150681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9164390.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 64150681 is about 8009.4120258606. The cubic root of 64150681 is about 400.3136727093.

The spelling of 64150681 in words is "sixty-four million, one hundred fifty thousand, six hundred eighty-one".