64180606620745 has 8 divisors (see below), whose sum is σ = 78071751615816. Its totient is φ = 50641136182656.

The previous prime is 64180606620727. The next prime is 64180606620761. The reversal of 64180606620745 is 54702660608146.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1216714890304 + 62963891730441 = 1103048^2 + 7934979^2 .

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 64180606620745 - 2¹¹ = 64180606618697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87918638842 + ... + 87918639571.

It is an arithmetic number, because the mean of its divisors is an integer number (9758968951977).

Almost surely, 2^{64180606620745} is an apocalyptic number.

It is an amenable number.

64180606620745 is a deficient number, since it is larger than the sum of its proper divisors (13891144995071).

64180606620745 is a wasteful number, since it uses less digits than its factorization.

64180606620745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175837278491.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 64180606620745 in words is "sixty-four trillion, one hundred eighty billion, six hundred six million, six hundred twenty thousand, seven hundred forty-five".