32478657661 has 2 divisors, whose sum is σ = 32478657662. Its totient is φ = 32478657660.

The previous prime is 32478657587. The next prime is 32478657691. The reversal of 32478657661 is 16675687423.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18417204100 + 14061453561 = 135710^2 + 118581^2 .

It is a cyclic number.

It is not a de Polignac number, because 32478657661 - 2¹⁷ = 32478526589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32478657691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16239328830 + 16239328831.

It is an arithmetic number, because the mean of its divisors is an integer number (16239328831).

Almost surely, 2^32478657661 is an apocalyptic number.

It is an amenable number.

32478657661 is a deficient number, since it is larger than the sum of its proper divisors (1).

32478657661 is an equidigital number, since it uses as much as digits as its factorization.

32478657661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 55.

The spelling of 32478657661 in words is "thirty-two billion, four hundred seventy-eight million, six hundred fifty-seven thousand, six hundred sixty-one".