905871739664 has 10 divisors (see below), whose sum is σ = 1755126495630. Its totient is φ = 452935869824.

The previous prime is 905871739613. The next prime is 905871739697. The reversal of 905871739664 is 466937178509.

It can be written as a sum of positive squares in only one way, i.e., 695209099264 + 210662640400 = 833792^2 + 458980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 905871739664.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28308491849 + ... + 28308491880.

It is an arithmetic number, because the mean of its divisors is an integer number (175512649563).

Almost surely, 2^905871739664 is an apocalyptic number.

It is an amenable number.

905871739664 is a deficient number, since it is larger than the sum of its proper divisors (849254755966).

905871739664 is a wasteful number, since it uses less digits than its factorization.

905871739664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56616983737 (or 56616983731 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 65.

The spelling of 905871739664 in words is "nine hundred five billion, eight hundred seventy-one million, seven hundred thirty-nine thousand, six hundred sixty-four".