400153423551 has 40 divisors (see below), whose sum is σ = 649486020480. Its totient is φ = 218717308656.

The previous prime is 400153423547. The next prime is 400153423589. The reversal of 400153423551 is 155324351004.

It is not a de Polignac number, because 400153423551 - 2² = 400153423547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400153423591) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1042021 + ... + 1373358.

It is an arithmetic number, because the mean of its divisors is an integer number (16237150512).

Almost surely, 2^400153423551 is an apocalyptic number.

400153423551 is a deficient number, since it is larger than the sum of its proper divisors (249332596929).

400153423551 is an equidigital number, since it uses as much as digits as its factorization.

400153423551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415433 (or 2415412 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 400153423551 its reverse (155324351004), we get a palindrome (555477774555).

The spelling of 400153423551 in words is "four hundred billion, one hundred fifty-three million, four hundred twenty-three thousand, five hundred fifty-one".