64549064842 has 4 divisors (see below), whose sum is σ = 96823597266. Its totient is φ = 32274532420.

The previous prime is 64549064761. The next prime is 64549064903. The reversal of 64549064842 is 24846094546.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57777256161 + 6771808681 = 240369^2 + 82291^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64549064842.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16137266209 + ... + 16137266212.

Almost surely, 2^64549064842 is an apocalyptic number.

64549064842 is a deficient number, since it is larger than the sum of its proper divisors (32274532424).

64549064842 is a wasteful number, since it uses less digits than its factorization.

64549064842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274532423.

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 64549064842 in words is "sixty-four billion, five hundred forty-nine million, sixty-four thousand, eight hundred forty-two".