64780743 has 8 divisors (see below), whose sum is σ = 86439808. Its totient is φ = 43154424.

The previous prime is 64780721. The next prime is 64780769. The reversal of 64780743 is 34708746.

It is a happy number.

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

It is not a de Polignac number, because 64780743 - 2¹⁸ = 64518599 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 (64780783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3121 + ... + 11802.

It is an arithmetic number, because the mean of its divisors is an integer number (10804976).

Almost surely, 2^64780743 is an apocalyptic number.

64780743 is a deficient number, since it is larger than the sum of its proper divisors (21659065).

64780743 is a wasteful number, since it uses less digits than its factorization.

64780743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16373.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 64780743 is about 8048.6485200933. The cubic root of 64780743 is about 401.6199782360.

The spelling of 64780743 in words is "sixty-four million, seven hundred eighty thousand, seven hundred forty-three".