401550777442 has 32 divisors (see below), whose sum is σ = 637138317312. Its totient is φ = 189418549584.

The previous prime is 401550777431. The next prime is 401550777451. The reversal of 401550777442 is 244777055104.

It is a super-2 number, since 2×401550777442² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 401550777392 and 401550777401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2230893 + ... + 2404159.

It is an arithmetic number, because the mean of its divisors is an integer number (19910572416).

Almost surely, 2^401550777442 is an apocalyptic number.

401550777442 is a deficient number, since it is larger than the sum of its proper divisors (235587539870).

401550777442 is a wasteful number, since it uses less digits than its factorization.

401550777442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173982.

The product of its (nonzero) digits is 1097600, while the sum is 46.

The spelling of 401550777442 in words is "four hundred one billion, five hundred fifty million, seven hundred seventy-seven thousand, four hundred forty-two".