140503522561601 has 4 divisors (see below), whose sum is σ = 141117075062100. Its totient is φ = 139889970061104.

The previous prime is 140503522561517. The next prime is 140503522561627. The reversal of 140503522561601 is 106165225305041.

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 95167809649201 + 45335712912400 = 9755399^2 + 6733180^2 .

It is a cyclic number.

It is not a de Polignac number, because 140503522561601 - 2¹⁸ = 140503522299457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140503522569601) 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, 306776249906 + ... + 306776250363.

It is an arithmetic number, because the mean of its divisors is an integer number (35279268765525).

Almost surely, 2^{140503522561601} is an apocalyptic number.

It is an amenable number.

140503522561601 is a deficient number, since it is larger than the sum of its proper divisors (613552500499).

140503522561601 is an equidigital number, since it uses as much as digits as its factorization.

140503522561601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613552500498.

The product of its (nonzero) digits is 216000, while the sum is 41.

Adding to 140503522561601 its reverse (106165225305041), we get a palindrome (246668747866642).

The spelling of 140503522561601 in words is "one hundred forty trillion, five hundred three billion, five hundred twenty-two million, five hundred sixty-one thousand, six hundred one".