64540716742 has 16 divisors (see below), whose sum is σ = 98259955200. Its totient is φ = 31789260360.

The previous prime is 64540716689. The next prime is 64540716761. The reversal of 64540716742 is 24761704546.

It is a junction number, because it is equal to n+sod(n) for n = 64540716692 and 64540716701.

It is a congruent number.

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, 395884 + ... + 534607.

It is an arithmetic number, because the mean of its divisors is an integer number (6141247200).

Almost surely, 2^64540716742 is an apocalyptic number.

64540716742 is a deficient number, since it is larger than the sum of its proper divisors (33719238458).

64540716742 is a wasteful number, since it uses less digits than its factorization.

64540716742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931011.

The product of its (nonzero) digits is 1128960, while the sum is 46.

The spelling of 64540716742 in words is "sixty-four billion, five hundred forty million, seven hundred sixteen thousand, seven hundred forty-two".