400061946551 has 2 divisors, whose sum is σ = 400061946552. Its totient is φ = 400061946550.

The previous prime is 400061946469. The next prime is 400061946569. The reversal of 400061946551 is 155649160004.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400061946551 is a prime.

It is a super-2 number, since 2×400061946551² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400061946499 and 400061946508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400061976551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200030973275 + 200030973276.

It is an arithmetic number, because the mean of its divisors is an integer number (200030973276).

Almost surely, 2^400061946551 is an apocalyptic number.

400061946551 is a deficient number, since it is larger than the sum of its proper divisors (1).

400061946551 is an equidigital number, since it uses as much as digits as its factorization.

400061946551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 400061946551 in words is "four hundred billion, sixty-one million, nine hundred forty-six thousand, five hundred fifty-one".