401955390420 has 48 divisors (see below), whose sum is σ = 1130522104320. Its totient is φ = 106707436416.

The previous prime is 401955390341. The next prime is 401955390467. The reversal of 401955390420 is 24093559104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15007375 + ... + 15034134.

It is an arithmetic number, because the mean of its divisors is an integer number (23552543840).

Almost surely, 2^401955390420 is an apocalyptic number.

It is an amenable number.

401955390420 is an abundant number, since it is smaller than the sum of its proper divisors (728566713900).

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

401955390420 is a wasteful number, since it uses less digits than its factorization.

401955390420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30041744 (or 30041742 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 401955390420 in words is "four hundred one billion, nine hundred fifty-five million, three hundred ninety thousand, four hundred twenty".