402479854577 has 2 divisors, whose sum is σ = 402479854578. Its totient is φ = 402479854576.

The previous prime is 402479854549. The next prime is 402479854619. The reversal of 402479854577 is 775458974204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287691704161 + 114788150416 = 536369^2 + 338804^2 .

It is a cyclic number.

It is not a de Polignac number, because 402479854577 - 2¹² = 402479850481 is a prime.

It is not a weakly prime, because it can be changed into another prime (402479854477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201239927288 + 201239927289.

It is an arithmetic number, because the mean of its divisors is an integer number (201239927289).

Almost surely, 2^402479854577 is an apocalyptic number.

It is an amenable number.

402479854577 is a deficient number, since it is larger than the sum of its proper divisors (1).

402479854577 is an equidigital number, since it uses as much as digits as its factorization.

402479854577 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79027200, while the sum is 62.

The spelling of 402479854577 in words is "four hundred two billion, four hundred seventy-nine million, eight hundred fifty-four thousand, five hundred seventy-seven".