231671450646 has 80 divisors (see below), whose sum is σ = 536093878320. Its totient is φ = 74721216960.

The previous prime is 231671450611. The next prime is 231671450671. The reversal of 231671450646 is 646054176132.

231671450646 is a `hidden beast` number, since 2 + 31 + 6 + 71 + 4 + 506 + 46 = 666.

231671450646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231671450646² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 978145 + ... + 1191683.

It is an arithmetic number, because the mean of its divisors is an integer number (6701173479).

Almost surely, 2^231671450646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231671450646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268046939160).

231671450646 is an abundant number, since it is smaller than the sum of its proper divisors (304422427674).

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

231671450646 is a wasteful number, since it uses less digits than its factorization.

231671450646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213771 (or 213762 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 231671450646 in words is "two hundred thirty-one billion, six hundred seventy-one million, four hundred fifty thousand, six hundred forty-six".