64078791 has 16 divisors (see below), whose sum is σ = 98304000. Its totient is φ = 36368928.

The previous prime is 64078771. The next prime is 64078793. The reversal of 64078791 is 19787046.

It is not a de Polignac number, because 64078791 - 2¹⁹ = 63554503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64078793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7111 + ... + 13368.

It is an arithmetic number, because the mean of its divisors is an integer number (6144000).

Almost surely, 2^64078791 is an apocalyptic number.

64078791 is a deficient number, since it is larger than the sum of its proper divisors (34225209).

64078791 is a wasteful number, since it uses less digits than its factorization.

64078791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20638.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 64078791 is about 8004.9229228019. The cubic root of 64078791 is about 400.1640806014.

The spelling of 64078791 in words is "sixty-four million, seventy-eight thousand, seven hundred ninety-one".