406645566552 has 48 divisors (see below), whose sum is σ = 1149215736240. Its totient is φ = 129655107648.

The previous prime is 406645566517. The next prime is 406645566571. The reversal of 406645566552 is 255665546604.

It is a happy number.

406645566552 is a `hidden beast` number, since 40 + 6 + 6 + 45 + 5 + 6 + 6 + 552 = 666.

It is a super-2 number, since 2×406645566552² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122777803 + ... + 122781114.

It is an arithmetic number, because the mean of its divisors is an integer number (23941994505).

Almost surely, 2^406645566552 is an apocalyptic number.

It is an amenable number.

406645566552 is an abundant number, since it is smaller than the sum of its proper divisors (742570169688).

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

406645566552 is a wasteful number, since it uses less digits than its factorization.

406645566552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245558952 (or 245558945 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 54.

The spelling of 406645566552 in words is "four hundred six billion, six hundred forty-five million, five hundred sixty-six thousand, five hundred fifty-two".