71740845157 has 4 divisors (see below), whose sum is σ = 73679786956. Its totient is φ = 69801903360.

The previous prime is 71740845091. The next prime is 71740845199. The reversal of 71740845157 is 75154804717.

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 66358275201 + 5382569956 = 257601^2 + 73366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71740845157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71740845157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71740842157) 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, 969470844 + ... + 969470917.

It is an arithmetic number, because the mean of its divisors is an integer number (18419946739).

Almost surely, 2^71740845157 is an apocalyptic number.

It is an amenable number.

71740845157 is a deficient number, since it is larger than the sum of its proper divisors (1938941799).

71740845157 is a wasteful number, since it uses less digits than its factorization.

71740845157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938941798.

The product of its (nonzero) digits is 1097600, while the sum is 49.

The spelling of 71740845157 in words is "seventy-one billion, seven hundred forty million, eight hundred forty-five thousand, one hundred fifty-seven".