35878603661 has 2 divisors, whose sum is σ = 35878603662. Its totient is φ = 35878603660.

The previous prime is 35878603643. The next prime is 35878603723. The reversal of 35878603661 is 16630687853.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35846227561 + 32376100 = 189331^2 + 5690^2 .

It is a cyclic number.

It is not a de Polignac number, because 35878603661 - 2⁶ = 35878603597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (35878605661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17939301830 + 17939301831.

It is an arithmetic number, because the mean of its divisors is an integer number (17939301831).

Almost surely, 2^35878603661 is an apocalyptic number.

It is an amenable number.

35878603661 is a deficient number, since it is larger than the sum of its proper divisors (1).

35878603661 is an equidigital number, since it uses as much as digits as its factorization.

35878603661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 35878603661 in words is "thirty-five billion, eight hundred seventy-eight million, six hundred three thousand, six hundred sixty-one".