400144133421552 has 120 divisors (see below), whose sum is σ = 1143153806402304. Its totient is φ = 120501670179072.

The previous prime is 400144133421517. The next prime is 400144133421559. The reversal of 400144133421552 is 255124331441004.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 400144133421552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400144133421559) 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, 524378658 + ... + 525141185.

Almost surely, 2^{400144133421552} is an apocalyptic number.

It is an amenable number.

400144133421552 is an abundant number, since it is smaller than the sum of its proper divisors (743009672980752).

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

400144133421552 is a wasteful number, since it uses less digits than its factorization.

400144133421552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049519927 (or 1049519908 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 400144133421552 its reverse (255124331441004), we get a palindrome (655268464862556).

The spelling of 400144133421552 in words is "four hundred trillion, one hundred forty-four billion, one hundred thirty-three million, four hundred twenty-one thousand, five hundred fifty-two".