61642033543 has 2 divisors, whose sum is σ = 61642033544. Its totient is φ = 61642033542.

The previous prime is 61642033493. The next prime is 61642033547. The reversal of 61642033543 is 34533024616.

61642033543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61642033543 - 2¹³ = 61642025351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61642033547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30821016771 + 30821016772.

It is an arithmetic number, because the mean of its divisors is an integer number (30821016772).

Almost surely, 2^61642033543 is an apocalyptic number.

61642033543 is a deficient number, since it is larger than the sum of its proper divisors (1).

61642033543 is an equidigital number, since it uses as much as digits as its factorization.

61642033543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 61642033543 in words is "sixty-one billion, six hundred forty-two million, thirty-three thousand, five hundred forty-three".