402986849561 has 2 divisors, whose sum is σ = 402986849562. Its totient is φ = 402986849560.

The previous prime is 402986849497. The next prime is 402986849567. The reversal of 402986849561 is 165948689204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 261775489600 + 141211359961 = 511640^2 + 375781^2 .

It is a cyclic number.

It is not a de Polignac number, because 402986849561 - 2⁶ = 402986849497 is a prime.

It is a super-3 number, since 3×402986849561³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 402986849494 and 402986849503.

It is not a weakly prime, because it can be changed into another prime (402986849567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201493424780 + 201493424781.

It is an arithmetic number, because the mean of its divisors is an integer number (201493424781).

Almost surely, 2^402986849561 is an apocalyptic number.

It is an amenable number.

402986849561 is a deficient number, since it is larger than the sum of its proper divisors (1).

402986849561 is an equidigital number, since it uses as much as digits as its factorization.

402986849561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29859840, while the sum is 62.

The spelling of 402986849561 in words is "four hundred two billion, nine hundred eighty-six million, eight hundred forty-nine thousand, five hundred sixty-one".