69897729651860 has 96 divisors (see below), whose sum is σ = 161555021655552. Its totient is φ = 25191082219520.

The previous prime is 69897729651853. The next prime is 69897729651979. The reversal of 69897729651860 is 6815692779896.

69897729651860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×69897729651860² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547179317 + ... + 547307043.

It is an arithmetic number, because the mean of its divisors is an integer number (1682864808912).

Almost surely, 2^{69897729651860} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 69897729651860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80777510827776).

69897729651860 is an abundant number, since it is smaller than the sum of its proper divisors (91657292003692).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69897729651860 is a wasteful number, since it uses less digits than its factorization.

69897729651860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149873 (or 149871 counting only the distinct ones).

The product of its (nonzero) digits is 4938071040, while the sum is 83.

The spelling of 69897729651860 in words is "sixty-nine trillion, eight hundred ninety-seven billion, seven hundred twenty-nine million, six hundred fifty-one thousand, eight hundred sixty".