402694803081 has 24 divisors (see below), whose sum is σ = 616636527624. Its totient is φ = 252363409920.

The previous prime is 402694803073. The next prime is 402694803083. The reversal of 402694803081 is 180308496204.

It is a happy number.

402694803081 is a `hidden beast` number, since 4 + 0 + 2 + 69 + 480 + 30 + 81 = 666.

402694803081 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 96820545600 + 305874257481 = 311160^2 + 553059^2 .

It is not a de Polignac number, because 402694803081 - 2³ = 402694803073 is a prime.

It is a super-2 number, since 2×402694803081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (402694803083) 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, 1477306 + ... + 1728531.

It is an arithmetic number, because the mean of its divisors is an integer number (25693188651).

Almost surely, 2^402694803081 is an apocalyptic number.

It is an amenable number.

402694803081 is a deficient number, since it is larger than the sum of its proper divisors (213941724543).

402694803081 is a wasteful number, since it uses less digits than its factorization.

402694803081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206681 (or 3206678 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 402694803081 in words is "four hundred two billion, six hundred ninety-four million, eight hundred three thousand, eighty-one".