69655242138 has 32 divisors (see below), whose sum is σ = 139933490112. Its totient is φ = 23114784000.

The previous prime is 69655242133. The next prime is 69655242143. The reversal of 69655242138 is 83124255696.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (69655242133) and next prime (69655242143).

It is a super-2 number, since 2×69655242138² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69655242133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1367170 + ... + 1417202.

It is an arithmetic number, because the mean of its divisors is an integer number (4372921566).

Almost surely, 2^69655242138 is an apocalyptic number.

69655242138 is an abundant number, since it is smaller than the sum of its proper divisors (70278247974).

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

69655242138 is a wasteful number, since it uses less digits than its factorization.

69655242138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51070.

The product of its digits is 3110400, while the sum is 51.

The spelling of 69655242138 in words is "sixty-nine billion, six hundred fifty-five million, two hundred forty-two thousand, one hundred thirty-eight".