401193621942 has 64 divisors (see below), whose sum is σ = 854239896576. Its totient is φ = 125340716160.

The previous prime is 401193621901. The next prime is 401193621943. The reversal of 401193621942 is 249126391104.

It is a junction number, because it is equal to n+sod(n) for n = 401193621894 and 401193621903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401193621943) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2123328 + ... + 2304540.

It is an arithmetic number, because the mean of its divisors is an integer number (13347498384).

Almost surely, 2^401193621942 is an apocalyptic number.

401193621942 is an abundant number, since it is smaller than the sum of its proper divisors (453046274634).

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

401193621942 is a wasteful number, since it uses less digits than its factorization.

401193621942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181565.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 401193621942 in words is "four hundred one billion, one hundred ninety-three million, six hundred twenty-one thousand, nine hundred forty-two".