71837009645 has 8 divisors (see below), whose sum is σ = 86515620504. Its totient is φ = 57262135104.

The previous prime is 71837009623. The next prime is 71837009677. The reversal of 71837009645 is 54690073817.

It can be written as a sum of positive squares in 4 ways, for example, as 7281379561 + 64555630084 = 85331^2 + 254078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71837009645 - 2⁶ = 71837009581 is a prime.

It is a super-3 number, since 3×71837009645³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71837009593 and 71837009602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25932554 + ... + 25935323.

It is an arithmetic number, because the mean of its divisors is an integer number (10814452563).

Almost surely, 2^71837009645 is an apocalyptic number.

It is an amenable number.

71837009645 is a deficient number, since it is larger than the sum of its proper divisors (14678610859).

71837009645 is a wasteful number, since it uses less digits than its factorization.

71837009645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51868159.

The product of its (nonzero) digits is 1270080, while the sum is 50.

The spelling of 71837009645 in words is "seventy-one billion, eight hundred thirty-seven million, nine thousand, six hundred forty-five".