64638425554 has 16 divisors (see below), whose sum is σ = 100916363520. Its totient is φ = 31013312400.

The previous prime is 64638425549. The next prime is 64638425623. The reversal of 64638425554 is 45552483646.

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, 3409122 + ... + 3428029.

It is an arithmetic number, because the mean of its divisors is an integer number (6307272720).

Almost surely, 2^64638425554 is an apocalyptic number.

64638425554 is a deficient number, since it is larger than the sum of its proper divisors (36277937966).

64638425554 is a wasteful number, since it uses less digits than its factorization.

64638425554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6837345.

The product of its digits is 13824000, while the sum is 52.

The spelling of 64638425554 in words is "sixty-four billion, six hundred thirty-eight million, four hundred twenty-five thousand, five hundred fifty-four".