400133245520 has 40 divisors (see below), whose sum is σ = 934202350080. Its totient is φ = 159383611520.

The previous prime is 400133245483. The next prime is 400133245537. The reversal of 400133245520 is 25542331004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×400133245520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10444616 + ... + 10482855.

It is an arithmetic number, because the mean of its divisors is an integer number (23355058752).

Almost surely, 2^400133245520 is an apocalyptic number.

400133245520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400133245520 is an abundant number, since it is smaller than the sum of its proper divisors (534069104560).

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

400133245520 is a wasteful number, since it uses less digits than its factorization.

400133245520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20927723 (or 20927717 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 400133245520 its reverse (25542331004), we get a palindrome (425675576524).

The spelling of 400133245520 in words is "four hundred billion, one hundred thirty-three million, two hundred forty-five thousand, five hundred twenty".