425853534615961 has 9 divisors (see below), whose sum is σ = 430113757608543. Its totient is φ = 421635099364200.

The previous prime is 425853534615889. The next prime is 425853534615973. The reversal of 425853534615961 is 169516435358524.

The square root of 425853534615961 is 20636219.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 409155033111561 + 16698501504400 = 20227581^2 + 4086380^2 .

It is not a de Polignac number, because 425853534615961 - 2¹⁹ = 425853534091673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425853534615661) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2084155960 + ... + 2084360278.

Almost surely, 2^{425853534615961} is an apocalyptic number.

425853534615961 is the 20636219-th square number.

425853534615961 is the 10318110-th centered octagonal number.

It is an amenable number.

425853534615961 is a deficient number, since it is larger than the sum of its proper divisors (4260222992582).

425853534615961 is an frugal number, since it uses more digits than its factorization.

425853534615961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408840 (or 204420 counting only the distinct ones).

The product of its digits is 466560000, while the sum is 67.

The spelling of 425853534615961 in words is "four hundred twenty-five trillion, eight hundred fifty-three billion, five hundred thirty-four million, six hundred fifteen thousand, nine hundred sixty-one".