61993228511 has 2 divisors, whose sum is σ = 61993228512. Its totient is φ = 61993228510.

The previous prime is 61993228487. The next prime is 61993228541. The reversal of 61993228511 is 11582239916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61993228511 - 2⁶ = 61993228447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61993228541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30996614255 + 30996614256.

It is an arithmetic number, because the mean of its divisors is an integer number (30996614256).

Almost surely, 2^61993228511 is an apocalyptic number.

61993228511 is a deficient number, since it is larger than the sum of its proper divisors (1).

61993228511 is an equidigital number, since it uses as much as digits as its factorization.

61993228511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 47.

The spelling of 61993228511 in words is "sixty-one billion, nine hundred ninety-three million, two hundred twenty-eight thousand, five hundred eleven".