403878881251 has 2 divisors, whose sum is σ = 403878881252. Its totient is φ = 403878881250.

The previous prime is 403878881239. The next prime is 403878881299. The reversal of 403878881251 is 152188878304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 403878881251 - 2²¹ = 403876784099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 403878881192 and 403878881201.

It is not a weakly prime, because it can be changed into another prime (403878884251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201939440625 + 201939440626.

It is an arithmetic number, because the mean of its divisors is an integer number (201939440626).

Almost surely, 2^403878881251 is an apocalyptic number.

403878881251 is a deficient number, since it is larger than the sum of its proper divisors (1).

403878881251 is an equidigital number, since it uses as much as digits as its factorization.

403878881251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3440640, while the sum is 55.

The spelling of 403878881251 in words is "four hundred three billion, eight hundred seventy-eight million, eight hundred eighty-one thousand, two hundred fifty-one".