69764641821 has 16 divisors (see below), whose sum is σ = 118120028800. Its totient is φ = 39865509504.

The previous prime is 69764641801. The next prime is 69764641823. The reversal of 69764641821 is 12814646796.

It is a de Polignac number, because none of the positive numbers 2^k-69764641821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69764641823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184562356 + ... + 184562733.

It is an arithmetic number, because the mean of its divisors is an integer number (7382501800).

Almost surely, 2^69764641821 is an apocalyptic number.

It is an amenable number.

69764641821 is a deficient number, since it is larger than the sum of its proper divisors (48355386979).

69764641821 is a wasteful number, since it uses less digits than its factorization.

69764641821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369125105 (or 369125099 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 69764641821 in words is "sixty-nine billion, seven hundred sixty-four million, six hundred forty-one thousand, eight hundred twenty-one".