140636163102521 has 4 divisors (see below), whose sum is σ = 140643187555044. Its totient is φ = 140629138650000.

The previous prime is 140636163102511. The next prime is 140636163102551. The reversal of 140636163102521 is 125201361636041.

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 9258260622121 + 131377902480400 = 3042739^2 + 11462020^2 .

It is a cyclic number.

It is not a de Polignac number, because 140636163102521 - 2¹⁸ = 140636162840377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140636163102511) 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, 3512196230 + ... + 3512236271.

It is an arithmetic number, because the mean of its divisors is an integer number (35160796888761).

Almost surely, 2^{140636163102521} is an apocalyptic number.

It is an amenable number.

140636163102521 is a deficient number, since it is larger than the sum of its proper divisors (7024452523).

140636163102521 is an equidigital number, since it uses as much as digits as its factorization.

140636163102521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7024452522.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 140636163102521 in words is "one hundred forty trillion, six hundred thirty-six billion, one hundred sixty-three million, one hundred two thousand, five hundred twenty-one".