64085778545428 has 12 divisors (see below), whose sum is σ = 112181802253920. Its totient is φ = 32033835044312.

The previous prime is 64085778545389. The next prime is 64085778545519. The reversal of 64085778545428 is 82454587758046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2263541176 + ... + 2263569487.

It is an arithmetic number, because the mean of its divisors is an integer number (9348483521160).

Almost surely, 2^{64085778545428} is an apocalyptic number.

It is an amenable number.

64085778545428 is a deficient number, since it is larger than the sum of its proper divisors (48096023708492).

64085778545428 is a wasteful number, since it uses less digits than its factorization.

64085778545428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4527114206 (or 4527114204 counting only the distinct ones).

The product of its (nonzero) digits is 2408448000, while the sum is 73.

The spelling of 64085778545428 in words is "sixty-four trillion, eighty-five billion, seven hundred seventy-eight million, five hundred forty-five thousand, four hundred twenty-eight".