64042040061 has 48 divisors (see below), whose sum is σ = 96341856000. Its totient is φ = 40944839040.

The previous prime is 64042040033. The next prime is 64042040063. The reversal of 64042040061 is 16004024046.

It is not a de Polignac number, because 64042040061 - 2⁷ = 64042039933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64042040063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26805855 + ... + 26808243.

It is an arithmetic number, because the mean of its divisors is an integer number (2007122000).

Almost surely, 2^64042040061 is an apocalyptic number.

It is an amenable number.

64042040061 is a deficient number, since it is larger than the sum of its proper divisors (32299815939).

64042040061 is a wasteful number, since it uses less digits than its factorization.

64042040061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074 (or 3071 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The spelling of 64042040061 in words is "sixty-four billion, forty-two million, forty thousand, sixty-one".