61571823623 has 2 divisors, whose sum is σ = 61571823624. Its totient is φ = 61571823622.

The previous prime is 61571823583. The next prime is 61571823637. The reversal of 61571823623 is 32632817516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61571823623 - 2⁶ = 61571823559 is a prime.

It is a super-2 number, since 2×61571823623² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61571826623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30785911811 + 30785911812.

It is an arithmetic number, because the mean of its divisors is an integer number (30785911812).

Almost surely, 2^61571823623 is an apocalyptic number.

61571823623 is a deficient number, since it is larger than the sum of its proper divisors (1).

61571823623 is an equidigital number, since it uses as much as digits as its factorization.

61571823623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The spelling of 61571823623 in words is "sixty-one billion, five hundred seventy-one million, eight hundred twenty-three thousand, six hundred twenty-three".