401131503440 has 40 divisors (see below), whose sum is σ = 943867276128. Its totient is φ = 158519434880.

The previous prime is 401131503439. The next prime is 401131503469. The reversal of 401131503440 is 44305131104.

It is a happy number.

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

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, 30199046 + ... + 30212325.

Almost surely, 2^401131503440 is an apocalyptic number.

401131503440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401131503440 is an abundant number, since it is smaller than the sum of its proper divisors (542735772688).

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

401131503440 is a wasteful number, since it uses less digits than its factorization.

401131503440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60411467 (or 60411461 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 401131503440 its reverse (44305131104), we get a palindrome (445436634544).

The spelling of 401131503440 in words is "four hundred one billion, one hundred thirty-one million, five hundred three thousand, four hundred forty".