140778025477 has 2 divisors, whose sum is σ = 140778025478. Its totient is φ = 140778025476.

The previous prime is 140778025441. The next prime is 140778025481. The reversal of 140778025477 is 774520877041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100463007681 + 40315017796 = 316959^2 + 200786^2 .

It is a cyclic number.

It is not a de Polignac number, because 140778025477 - 2²³ = 140769636869 is a prime.

It is a super-2 number, since 2×140778025477² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140778025417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70389012738 + 70389012739.

It is an arithmetic number, because the mean of its divisors is an integer number (70389012739).

Almost surely, 2^140778025477 is an apocalyptic number.

It is an amenable number.

140778025477 is a deficient number, since it is larger than the sum of its proper divisors (1).

140778025477 is an equidigital number, since it uses as much as digits as its factorization.

140778025477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3073280, while the sum is 52.

The spelling of 140778025477 in words is "one hundred forty billion, seven hundred seventy-eight million, twenty-five thousand, four hundred seventy-seven".