64408372755 has 16 divisors (see below), whose sum is σ = 103106264064. Its totient is φ = 34333509600.

The previous prime is 64408372741. The next prime is 64408372757. The reversal of 64408372755 is 55727380446.

It is a happy number.

It is not a de Polignac number, because 64408372755 - 2⁴ = 64408372739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64408372698 and 64408372707.

It is not an unprimeable number, because it can be changed into a prime (64408372757) 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, 1071169 + ... + 1129698.

It is an arithmetic number, because the mean of its divisors is an integer number (6444141504).

Almost surely, 2^64408372755 is an apocalyptic number.

64408372755 is a deficient number, since it is larger than the sum of its proper divisors (38697891309).

64408372755 is a wasteful number, since it uses less digits than its factorization.

64408372755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2202826.

The product of its (nonzero) digits is 5644800, while the sum is 51.

The spelling of 64408372755 in words is "sixty-four billion, four hundred eight million, three hundred seventy-two thousand, seven hundred fifty-five".