425635139977 has 2 divisors, whose sum is σ = 425635139978. Its totient is φ = 425635139976.

The previous prime is 425635139953. The next prime is 425635140013. The reversal of 425635139977 is 779931536524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424659452281 + 975687696 = 651659^2 + 31236^2 .

It is a cyclic number.

It is not a de Polignac number, because 425635139977 - 2³¹ = 423487656329 is a prime.

It is not a weakly prime, because it can be changed into another prime (425635139777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212817569988 + 212817569989.

It is an arithmetic number, because the mean of its divisors is an integer number (212817569989).

Almost surely, 2^425635139977 is an apocalyptic number.

It is an amenable number.

425635139977 is a deficient number, since it is larger than the sum of its proper divisors (1).

425635139977 is an equidigital number, since it uses as much as digits as its factorization.

425635139977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42865200, while the sum is 61.

The spelling of 425635139977 in words is "four hundred twenty-five billion, six hundred thirty-five million, one hundred thirty-nine thousand, nine hundred seventy-seven".