64040761 has 8 divisors (see below), whose sum is σ = 66549248. Its totient is φ = 61560000.

The previous prime is 64040741. The next prime is 64040777. The reversal of 64040761 is 16704046.

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 64040761 - 2⁷ = 64040633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64040741) 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, 2160 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (8318656).

Almost surely, 2^64040761 is an apocalyptic number.

It is an amenable number.

64040761 is a deficient number, since it is larger than the sum of its proper divisors (2508487).

64040761 is a wasteful number, since it uses less digits than its factorization.

64040761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13863.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 64040761 is about 8002.5471569995. The cubic root of 64040761 is about 400.0849007284.

The spelling of 64040761 in words is "sixty-four million, forty thousand, seven hundred sixty-one".