405351421240 has 16 divisors (see below), whose sum is σ = 912040697880. Its totient is φ = 162140568480.

The previous prime is 405351421193. The next prime is 405351421253. The reversal of 405351421240 is 42124153504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5066892726 + ... + 5066892805.

Almost surely, 2^405351421240 is an apocalyptic number.

405351421240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

405351421240 is an abundant number, since it is smaller than the sum of its proper divisors (506689276640).

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

405351421240 is a wasteful number, since it uses less digits than its factorization.

405351421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10133785542 (or 10133785538 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 405351421240 its reverse (42124153504), we get a palindrome (447475574744).

The spelling of 405351421240 in words is "four hundred five billion, three hundred fifty-one million, four hundred twenty-one thousand, two hundred forty".