61761738092143 has 16 divisors (see below), whose sum is σ = 61974774781920. Its totient is φ = 61549071232000.

The previous prime is 61761738092123. The next prime is 61761738092291. The reversal of 61761738092143 is 34129083716716.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61761738092143 - 2⁹ = 61761738091631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61761738092123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3788823093 + ... + 3788839393.

It is an arithmetic number, because the mean of its divisors is an integer number (3873423423870).

Almost surely, 2^{61761738092143} is an apocalyptic number.

61761738092143 is a deficient number, since it is larger than the sum of its proper divisors (213036689777).

61761738092143 is a wasteful number, since it uses less digits than its factorization.

61761738092143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26858.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 61761738092143 in words is "sixty-one trillion, seven hundred sixty-one billion, seven hundred thirty-eight million, ninety-two thousand, one hundred forty-three".