406977921603 has 48 divisors (see below), whose sum is σ = 647526204000. Its totient is φ = 244267914240.

The previous prime is 406977921583. The next prime is 406977921641. The reversal of 406977921603 is 306129779604.

It is a happy number.

406977921603 is a `hidden beast` number, since 4 + 0 + 6 + 9 + 7 + 7 + 9 + 21 + 603 = 666.

It is not a de Polignac number, because 406977921603 - 2¹⁰ = 406977920579 is a prime.

It is a super-2 number, since 2×406977921603² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406977921603.

It is not an unprimeable number, because it can be changed into a prime (406977921653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4930153 + ... + 5012021.

It is an arithmetic number, because the mean of its divisors is an integer number (13490129250).

Almost surely, 2^406977921603 is an apocalyptic number.

406977921603 is a deficient number, since it is larger than the sum of its proper divisors (240548282397).

406977921603 is a wasteful number, since it uses less digits than its factorization.

406977921603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82372 (or 82369 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 406977921603 in words is "four hundred six billion, nine hundred seventy-seven million, nine hundred twenty-one thousand, six hundred three".