401652665280 has 1120 divisors, whose sum is σ = 1553950379520. Its totient is φ = 98209013760.

The previous prime is 401652665269. The next prime is 401652665299. The reversal of 401652665280 is 82566256104.

401652665280 is a `hidden beast` number, since 4 + 0 + 1 + 65 + 2 + 66 + 528 + 0 = 666.

It is a super-2 number, since 2×401652665280² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2889587451 + ... + 2889587589.

It is an arithmetic number, because the mean of its divisors is an integer number (1387455696).

Almost surely, 2^401652665280 is an apocalyptic number.

401652665280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401652665280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (776975189760).

401652665280 is an abundant number, since it is smaller than the sum of its proper divisors (1152297714240).

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

401652665280 is a wasteful number, since it uses less digits than its factorization.

401652665280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 340 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 401652665280 in words is "four hundred one billion, six hundred fifty-two million, six hundred sixty-five thousand, two hundred eighty".