2956099087561 has 9 divisors (see below), whose sum is σ = 2961726825031. Its totient is φ = 2950482033184.

The previous prime is 2956099087559. The next prime is 2956099087583. The reversal of 2956099087561 is 1657809906592.

The square root of 2956099087561 is 1719331.

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., 1421176321161 + 1534922766400 = 1192131^2 + 1238920^2 .

It is not a de Polignac number, because 2956099087561 - 2¹ = 2956099087559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2956099087541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1133037825 + ... + 1133040433.

Almost surely, 2^{2956099087561} is an apocalyptic number.

2956099087561 is the 1719331-st square number.

2956099087561 is the 859666-th centered octagonal number.

It is an amenable number.

2956099087561 is a deficient number, since it is larger than the sum of its proper divisors (5627737470).

2956099087561 is an frugal number, since it uses more digits than its factorization.

2956099087561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 67.

The spelling of 2956099087561 in words is "two trillion, nine hundred fifty-six billion, ninety-nine million, eighty-seven thousand, five hundred sixty-one".