3540989861 has 2 divisors, whose sum is σ = 3540989862. Its totient is φ = 3540989860.

The previous prime is 3540989821. The next prime is 3540989897. The reversal of 3540989861 is 1689890453.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2949576100 + 591413761 = 54310^2 + 24319^2 .

It is an emirp because it is prime and its reverse (1689890453) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3540989861 - 2³⁰ = 2467248037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3540989821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1770494930 + 1770494931.

It is an arithmetic number, because the mean of its divisors is an integer number (1770494931).

Almost surely, 2^3540989861 is an apocalyptic number.

It is an amenable number.

3540989861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3540989861 is an equidigital number, since it uses as much as digits as its factorization.

3540989861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 3540989861 is about 59506.2169945292. The cubic root of 3540989861 is about 1524.1986094529.

The spelling of 3540989861 in words is "three billion, five hundred forty million, nine hundred eighty-nine thousand, eight hundred sixty-one".