8185981605537 has 8 divisors (see below), whose sum is σ = 11389191799104. Its totient is φ = 5220046241168.

The previous prime is 8185981605463. The next prime is 8185981605551. The reversal of 8185981605537 is 7355061895818.

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 8185981605537 - 2¹⁰ = 8185981604513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8185981605037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59318707218 + ... + 59318707355.

It is an arithmetic number, because the mean of its divisors is an integer number (1423648974888).

Almost surely, 2^{8185981605537} is an apocalyptic number.

It is an amenable number.

8185981605537 is a deficient number, since it is larger than the sum of its proper divisors (3203210193567).

8185981605537 is a wasteful number, since it uses less digits than its factorization.

8185981605537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118637414599.

The product of its (nonzero) digits is 72576000, while the sum is 66.

The spelling of 8185981605537 in words is "eight trillion, one hundred eighty-five billion, nine hundred eighty-one million, six hundred five thousand, five hundred thirty-seven".