42963685699561 has 27 divisors (see below), whose sum is σ = 48136669632247. Its totient is φ = 38317546226960.

The previous prime is 42963685699547. The next prime is 42963685699603. The reversal of 42963685699561 is 16599658636924.

The square root of 42963685699561 is 6554669.

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., 30972397131225 + 11991288568336 = 5565285^2 + 3462844^2 .

It is not a de Polignac number, because 42963685699561 - 2¹⁵ = 42963685666793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42963685694561) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3821366406 + ... + 3821377648.

Almost surely, 2^{42963685699561} is an apocalyptic number.

42963685699561 is the 6554669-th square number.

42963685699561 is the 3277335-th centered octagonal number.

It is an amenable number.

42963685699561 is a deficient number, since it is larger than the sum of its proper divisors (5172983932686).

42963685699561 is an frugal number, since it uses more digits than its factorization.

42963685699561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22614 (or 11307 counting only the distinct ones).

The product of its digits is 4534963200, while the sum is 79.

The spelling of 42963685699561 in words is "forty-two trillion, nine hundred sixty-three billion, six hundred eighty-five million, six hundred ninety-nine thousand, five hundred sixty-one".