71689136955 has 32 divisors (see below), whose sum is σ = 118437242880. Its totient is φ = 36990051840.

The previous prime is 71689136929. The next prime is 71689136957. The reversal of 71689136955 is 55963198617.

It is not a de Polignac number, because 71689136955 - 2¹⁸ = 71688874811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71689136957) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1718019 + ... + 1759251.

It is an arithmetic number, because the mean of its divisors is an integer number (3701163840).

Almost surely, 2^71689136955 is an apocalyptic number.

71689136955 is a deficient number, since it is larger than the sum of its proper divisors (46748105925).

71689136955 is a wasteful number, since it uses less digits than its factorization.

71689136955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45011.

The product of its digits is 12247200, while the sum is 60.

The spelling of 71689136955 in words is "seventy-one billion, six hundred eighty-nine million, one hundred thirty-six thousand, nine hundred fifty-five".