64947766774946 has 32 divisors (see below), whose sum is σ = 106837831414080. Its totient is φ = 29366479800000.

The previous prime is 64947766774939. The next prime is 64947766774963.

It is a happy number.

64947766774946 is nontrivially palindromic in base 10.

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, 143180 + ... + 11398071.

It is an arithmetic number, because the mean of its divisors is an integer number (3338682231690).

Almost surely, 2^{64947766774946} is an apocalyptic number.

64947766774946 is a deficient number, since it is larger than the sum of its proper divisors (41890064639134).

64947766774946 is a wasteful number, since it uses less digits than its factorization.

64947766774946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11542610.

The product of its digits is 64524128256, while the sum is 86.

The spelling of 64947766774946 in words is "sixty-four trillion, nine hundred forty-seven billion, seven hundred sixty-six million, seven hundred seventy-four thousand, nine hundred forty-six".