69421371664 has 10 divisors (see below), whose sum is σ = 134503907630. Its totient is φ = 34710685824.

The previous prime is 69421371647. The next prime is 69421371671. The reversal of 69421371664 is 46617312496.

It can be written as a sum of positive squares in only one way, i.e., 65386581264 + 4034790400 = 255708^2 + 63520^2 .

It is a super-2 number, since 2×69421371664² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2169417849 + ... + 2169417880.

It is an arithmetic number, because the mean of its divisors is an integer number (13450390763).

Almost surely, 2^69421371664 is an apocalyptic number.

It is an amenable number.

69421371664 is a deficient number, since it is larger than the sum of its proper divisors (65082535966).

69421371664 is a wasteful number, since it uses less digits than its factorization.

69421371664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4338835737 (or 4338835731 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The spelling of 69421371664 in words is "sixty-nine billion, four hundred twenty-one million, three hundred seventy-one thousand, six hundred sixty-four".