140509686491 has 8 divisors (see below), whose sum is σ = 140828996880. Its totient is φ = 140190455808.

The previous prime is 140509686437. The next prime is 140509686503. The reversal of 140509686491 is 194686905041.

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 140509686491 - 2¹⁰ = 140509685467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140509686391) 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, 4827815 + ... + 4856831.

It is an arithmetic number, because the mean of its divisors is an integer number (17603624610).

Almost surely, 2^140509686491 is an apocalyptic number.

140509686491 is a deficient number, since it is larger than the sum of its proper divisors (319310389).

140509686491 is a wasteful number, since it uses less digits than its factorization.

140509686491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39853.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 140509686491 in words is "one hundred forty billion, five hundred nine million, six hundred eighty-six thousand, four hundred ninety-one".