401396677550 has 48 divisors (see below), whose sum is σ = 814681107072. Its totient is φ = 145924658400.

The previous prime is 401396677519. The next prime is 401396677579. The reversal of 401396677550 is 55776693104.

It is a super-2 number, since 2×401396677550² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401396677492 and 401396677501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2078399 + ... + 2263301.

It is an arithmetic number, because the mean of its divisors is an integer number (16972523064).

Almost surely, 2^401396677550 is an apocalyptic number.

401396677550 is an abundant number, since it is smaller than the sum of its proper divisors (413284429522).

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

401396677550 is a wasteful number, since it uses less digits than its factorization.

401396677550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188873 (or 188868 counting only the distinct ones).

The product of its (nonzero) digits is 4762800, while the sum is 53.

The spelling of 401396677550 in words is "four hundred one billion, three hundred ninety-six million, six hundred seventy-seven thousand, five hundred fifty".