140056540621 has 2 divisors, whose sum is σ = 140056540622. Its totient is φ = 140056540620.

The previous prime is 140056540601. The next prime is 140056540639. The reversal of 140056540621 is 126045650041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119875212900 + 20181327721 = 346230^2 + 142061^2 .

It is a cyclic number.

It is not a de Polignac number, because 140056540621 - 2¹⁹ = 140056016333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140056540601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70028270310 + 70028270311.

It is an arithmetic number, because the mean of its divisors is an integer number (70028270311).

Almost surely, 2^140056540621 is an apocalyptic number.

It is an amenable number.

140056540621 is a deficient number, since it is larger than the sum of its proper divisors (1).

140056540621 is an equidigital number, since it uses as much as digits as its factorization.

140056540621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 34.

The spelling of 140056540621 in words is "one hundred forty billion, fifty-six million, five hundred forty thousand, six hundred twenty-one".