140442657491 has 2 divisors, whose sum is σ = 140442657492. Its totient is φ = 140442657490.

The previous prime is 140442657469. The next prime is 140442657497. The reversal of 140442657491 is 194756244041.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140442657491 - 2⁶ = 140442657427 is a prime.

It is not a weakly prime, because it can be changed into another prime (140442657497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70221328745 + 70221328746.

It is an arithmetic number, because the mean of its divisors is an integer number (70221328746).

Almost surely, 2^140442657491 is an apocalyptic number.

140442657491 is a deficient number, since it is larger than the sum of its proper divisors (1).

140442657491 is an equidigital number, since it uses as much as digits as its factorization.

140442657491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 140442657491 in words is "one hundred forty billion, four hundred forty-two million, six hundred fifty-seven thousand, four hundred ninety-one".