401550777427 has 2 divisors, whose sum is σ = 401550777428. Its totient is φ = 401550777426.

The previous prime is 401550777409. The next prime is 401550777431. The reversal of 401550777427 is 724777055104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401550777427 is a prime.

It is a super-2 number, since 2×401550777427² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (401550727427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200775388713 + 200775388714.

It is an arithmetic number, because the mean of its divisors is an integer number (200775388714).

Almost surely, 2^401550777427 is an apocalyptic number.

401550777427 is a deficient number, since it is larger than the sum of its proper divisors (1).

401550777427 is an equidigital number, since it uses as much as digits as its factorization.

401550777427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920800, while the sum is 49.

The spelling of 401550777427 in words is "four hundred one billion, five hundred fifty million, seven hundred seventy-seven thousand, four hundred twenty-seven".