61123451429 has 2 divisors, whose sum is σ = 61123451430. Its totient is φ = 61123451428.

The previous prime is 61123451423. The next prime is 61123451443. The reversal of 61123451429 is 92415432116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40874730625 + 20248720804 = 202175^2 + 142298^2 .

It is a cyclic number.

It is not a de Polignac number, because 61123451429 - 2⁸ = 61123451173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61123451392 and 61123451401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61123451423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30561725714 + 30561725715.

It is an arithmetic number, because the mean of its divisors is an integer number (30561725715).

Almost surely, 2^61123451429 is an apocalyptic number.

It is an amenable number.

61123451429 is a deficient number, since it is larger than the sum of its proper divisors (1).

61123451429 is an equidigital number, since it uses as much as digits as its factorization.

61123451429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The spelling of 61123451429 in words is "sixty-one billion, one hundred twenty-three million, four hundred fifty-one thousand, four hundred twenty-nine".