64791645 has 16 divisors (see below), whose sum is σ = 104102592. Its totient is φ = 34410240.

The previous prime is 64791637. The next prime is 64791647. The reversal of 64791645 is 54619746.

It is not a de Polignac number, because 64791645 - 2³ = 64791637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64791597 and 64791606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64791647) 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, 5347 + ... + 12576.

It is an arithmetic number, because the mean of its divisors is an integer number (6506412).

Almost surely, 2^64791645 is an apocalyptic number.

It is an amenable number.

64791645 is a deficient number, since it is larger than the sum of its proper divisors (39310947).

64791645 is a wasteful number, since it uses less digits than its factorization.

64791645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18172.

The product of its digits is 181440, while the sum is 42.

The square root of 64791645 is about 8049.3257481605. The cubic root of 64791645 is about 401.6425066150.

The spelling of 64791645 in words is "sixty-four million, seven hundred ninety-one thousand, six hundred forty-five".