16640190707481 has 24 divisors (see below), whose sum is σ = 26221035054240. Its totient is φ = 10084914648000.

The previous prime is 16640190707447. The next prime is 16640190707527. The reversal of 16640190707481 is 18470709104661.

16640190707481 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 0 + 1 + 90 + 70 + 7 + 481 = 666.

It is not a de Polignac number, because 16640190707481 - 2¹⁷ = 16640190576409 is a prime.

It is a super-2 number, since 2×16640190707481² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16640190707401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36703581 + ... + 37154181.

It is an arithmetic number, because the mean of its divisors is an integer number (1092543127260).

Almost surely, 2^{16640190707481} is an apocalyptic number.

16640190707481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16640190707481 is a deficient number, since it is larger than the sum of its proper divisors (9580844346759).

16640190707481 is a wasteful number, since it uses less digits than its factorization.

16640190707481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823637 (or 823634 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 16640190707481 in words is "sixteen trillion, six hundred forty billion, one hundred ninety million, seven hundred seven thousand, four hundred eighty-one".