400034155551 has 24 divisors (see below), whose sum is σ = 543427637760. Its totient is φ = 261751968240.

The previous prime is 400034155463. The next prime is 400034155553. The reversal of 400034155551 is 155551430004.

It is not a de Polignac number, because 400034155551 - 2¹⁸ = 400033893407 is a prime.

It is a super-2 number, since 2×400034155551² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400034155553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3313120 + ... + 3431738.

It is an arithmetic number, because the mean of its divisors is an integer number (22642818240).

Almost surely, 2^400034155551 is an apocalyptic number.

400034155551 is a deficient number, since it is larger than the sum of its proper divisors (143393482209).

400034155551 is a wasteful number, since it uses less digits than its factorization.

400034155551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118987 (or 118916 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 33.

Adding to 400034155551 its reverse (155551430004), we get a palindrome (555585585555).

The spelling of 400034155551 in words is "four hundred billion, thirty-four million, one hundred fifty-five thousand, five hundred fifty-one".