854298653561 has 2 divisors, whose sum is σ = 854298653562. Its totient is φ = 854298653560.

The previous prime is 854298653441. The next prime is 854298653567. The reversal of 854298653561 is 165356892458.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828930127936 + 25368525625 = 910456^2 + 159275^2 .

It is a cyclic number.

It is not a de Polignac number, because 854298653561 - 2¹⁸ = 854298391417 is a prime.

It is a super-2 number, since 2×854298653561² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 854298653494 and 854298653503.

It is not a weakly prime, because it can be changed into another prime (854298653567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427149326780 + 427149326781.

It is an arithmetic number, because the mean of its divisors is an integer number (427149326781).

Almost surely, 2^854298653561 is an apocalyptic number.

It is an amenable number.

854298653561 is a deficient number, since it is larger than the sum of its proper divisors (1).

854298653561 is an equidigital number, since it uses as much as digits as its factorization.

854298653561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208000, while the sum is 62.

The spelling of 854298653561 in words is "eight hundred fifty-four billion, two hundred ninety-eight million, six hundred fifty-three thousand, five hundred sixty-one".