71842733285977 has 4 divisors (see below), whose sum is σ = 71851956908260. Its totient is φ = 71833509663696.

The previous prime is 71842733285957. The next prime is 71842733286001. The reversal of 71842733285977 is 77958233724817.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42761908269081 + 29080825016896 = 6539259^2 + 5392664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71842733285977 is a prime.

It is a super-2 number, since 2×71842733285977² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71842733285957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4611799458 + ... + 4611815035.

It is an arithmetic number, because the mean of its divisors is an integer number (17962989227065).

Almost surely, 2^{71842733285977} is an apocalyptic number.

It is an amenable number.

71842733285977 is a deficient number, since it is larger than the sum of its proper divisors (9223622283).

71842733285977 is an equidigital number, since it uses as much as digits as its factorization.

71842733285977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9223622282.

The product of its digits is 995742720, while the sum is 73.

The spelling of 71842733285977 in words is "seventy-one trillion, eight hundred forty-two billion, seven hundred thirty-three million, two hundred eighty-five thousand, nine hundred seventy-seven".