400514431551 has 48 divisors (see below), whose sum is σ = 614784992256. Its totient is φ = 231305762688.

The previous prime is 400514431547. The next prime is 400514431561. The reversal of 400514431551 is 155134415004.

It is not a de Polignac number, because 400514431551 - 2² = 400514431547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400514431561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 294010 + ... + 942056.

It is an arithmetic number, because the mean of its divisors is an integer number (12808020672).

Almost surely, 2^400514431551 is an apocalyptic number.

400514431551 is a deficient number, since it is larger than the sum of its proper divisors (214270560705).

400514431551 is a wasteful number, since it uses less digits than its factorization.

400514431551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648152 (or 648139 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 400514431551 its reverse (155134415004), we get a palindrome (555648846555).

The spelling of 400514431551 in words is "four hundred billion, five hundred fourteen million, four hundred thirty-one thousand, five hundred fifty-one".