802473561981 has 192 divisors, whose sum is σ = 1487337779200. Its totient is φ = 414180708480.

The previous prime is 802473561977. The next prime is 802473562003. The reversal of 802473561981 is 189165374208.

802473561981 is a `hidden beast` number, since 8 + 0 + 2 + 4 + 73 + 561 + 9 + 8 + 1 = 666.

It is not a de Polignac number, because 802473561981 - 2² = 802473561977 is a prime.

It is a super-2 number, since 2×802473561981² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (802473561181) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 438269736 + ... + 438271566.

It is a 1-persistent number, because it is pandigital, but 2⋅802473561981 = 1604947123962 is not.

Almost surely, 2^802473561981 is an apocalyptic number.

It is an amenable number.

802473561981 is a deficient number, since it is larger than the sum of its proper divisors (684864217219).

802473561981 is a wasteful number, since it uses less digits than its factorization.

802473561981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 802473561981 in words is "eight hundred two billion, four hundred seventy-three million, five hundred sixty-one thousand, nine hundred eighty-one".