64773481 has 8 divisors (see below), whose sum is σ = 66616704. Its totient is φ = 62942880.

The previous prime is 64773479. The next prime is 64773487. The reversal of 64773481 is 18437746.

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 64773481 - 2¹ = 64773479 is a prime.

It is a super-2 number, since 2×64773481² = 8391207681714722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64773487) 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, 7780 + ... + 13786.

It is an arithmetic number, because the mean of its divisors is an integer number (8327088).

Almost surely, 2^64773481 is an apocalyptic number.

It is an amenable number.

64773481 is a deficient number, since it is larger than the sum of its proper divisors (1843223).

64773481 is a wasteful number, since it uses less digits than its factorization.

64773481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311.

The product of its digits is 112896, while the sum is 40.

The square root of 64773481 is about 8048.1973758103. The cubic root of 64773481 is about 401.6049703126.

The spelling of 64773481 in words is "sixty-four million, seven hundred seventy-three thousand, four hundred eighty-one".