69877997568 has 196 divisors, whose sum is σ = 209543255538. Its totient is φ = 23290675200.

The previous prime is 69877997491. The next prime is 69877997587. The reversal of 69877997568 is 86579977896.

It can be written as a sum of positive squares in only one way, i.e., 51242471424 + 18635526144 = 226368^2 + 136512^2 .

It is a super-2 number, since 2×69877997568² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 5966118 + ... + 5977818.

Almost surely, 2^69877997568 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 69877997568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104771627769).

69877997568 is an abundant number, since it is smaller than the sum of its proper divisors (139665257970).

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

69877997568 is an frugal number, since it uses more digits than its factorization.

69877997568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11745 (or 11706 counting only the distinct ones).

The product of its digits is 2880541440, while the sum is 81.

The spelling of 69877997568 in words is "sixty-nine billion, eight hundred seventy-seven million, nine hundred ninety-seven thousand, five hundred sixty-eight".