32978783561 has 2 divisors, whose sum is σ = 32978783562. Its totient is φ = 32978783560.

The previous prime is 32978783543. The next prime is 32978783567. The reversal of 32978783561 is 16538787923.

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., 24113431225 + 8865352336 = 155285^2 + 94156^2 .

It is a cyclic number.

It is not a de Polignac number, because 32978783561 - 2¹⁰ = 32978782537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32978783561.

It is not a weakly prime, because it can be changed into another prime (32978783567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16489391780 + 16489391781.

It is an arithmetic number, because the mean of its divisors is an integer number (16489391781).

Almost surely, 2^32978783561 is an apocalyptic number.

It is an amenable number.

32978783561 is a deficient number, since it is larger than the sum of its proper divisors (1).

32978783561 is an equidigital number, since it uses as much as digits as its factorization.

32978783561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The spelling of 32978783561 in words is "thirty-two billion, nine hundred seventy-eight million, seven hundred eighty-three thousand, five hundred sixty-one".