64449289090 has 32 divisors (see below), whose sum is σ = 118569878784. Its totient is φ = 25211429760.

The previous prime is 64449289057. The next prime is 64449289109. The reversal of 64449289090 is 9098294446.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553662 + ... + 659878.

It is an arithmetic number, because the mean of its divisors is an integer number (3705308712).

Almost surely, 2^64449289090 is an apocalyptic number.

64449289090 is a deficient number, since it is larger than the sum of its proper divisors (54120589694).

64449289090 is a wasteful number, since it uses less digits than its factorization.

64449289090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107562.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 64449289090 in words is "sixty-four billion, four hundred forty-nine million, two hundred eighty-nine thousand, ninety".