921968834049 has 24 divisors (see below), whose sum is σ = 1337714001312. Its totient is φ = 611889465600.

The previous prime is 921968834027. The next prime is 921968834081. The reversal of 921968834049 is 940438869129.

921968834049 is a `hidden beast` number, since 9 + 219 + 6 + 8 + 8 + 3 + 404 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-921968834049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (921968834099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2504689 + ... + 2849105.

It is an arithmetic number, because the mean of its divisors is an integer number (55738083388).

Almost surely, 2^921968834049 is an apocalyptic number.

It is an amenable number.

921968834049 is a deficient number, since it is larger than the sum of its proper divisors (415745167263).

921968834049 is a wasteful number, since it uses less digits than its factorization.

921968834049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345757 (or 345754 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 63.

The spelling of 921968834049 in words is "nine hundred twenty-one billion, nine hundred sixty-eight million, eight hundred thirty-four thousand, forty-nine".