400155033204 has 18 divisors (see below), whose sum is σ = 1011503000690. Its totient is φ = 133385011056.

The previous prime is 400155033167. The next prime is 400155033217. The reversal of 400155033204 is 402330551004.

400155033204 is a `hidden beast` number, since 400 + 1 + 5 + 50 + 3 + 3 + 204 = 666.

It can be written as a sum of positive squares in only one way, i.e., 322564930704 + 77590102500 = 567948^2 + 278550^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×400155033204³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5557708759 + ... + 5557708830.

Almost surely, 2^400155033204 is an apocalyptic number.

It is an amenable number.

400155033204 is an abundant number, since it is smaller than the sum of its proper divisors (611347967486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400155033204 is a wasteful number, since it uses less digits than its factorization.

400155033204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11115417599 (or 11115417594 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 400155033204 its reverse (402330551004), we get a palindrome (802485584208).

The spelling of 400155033204 in words is "four hundred billion, one hundred fifty-five million, thirty-three thousand, two hundred four".