406065690981996 has 96 divisors (see below), whose sum is σ = 1027255474586880. Its totient is φ = 124345237653504.

The previous prime is 406065690981991. The next prime is 406065690981997. The reversal of 406065690981996 is 699189096560604.

It is a super-2 number, since 2×406065690981996² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (406065690981991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3065641 + ... + 28662336.

It is an arithmetic number, because the mean of its divisors is an integer number (10700577860280).

Almost surely, 2^{406065690981996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406065690981996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (513627737293440).

406065690981996 is an abundant number, since it is smaller than the sum of its proper divisors (621189783604884).

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

406065690981996 is a wasteful number, since it uses less digits than its factorization.

406065690981996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31729503 (or 31729501 counting only the distinct ones).

The product of its (nonzero) digits is 1360488960, while the sum is 78.

The spelling of 406065690981996 in words is "four hundred six trillion, sixty-five billion, six hundred ninety million, nine hundred eighty-one thousand, nine hundred ninety-six".