23424871661 has 2 divisors, whose sum is σ = 23424871662. Its totient is φ = 23424871660.

The previous prime is 23424871649. The next prime is 23424871681. The reversal of 23424871661 is 16617842432.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17690596036 + 5734275625 = 133006^2 + 75725^2 .

It is a cyclic number.

It is not a de Polignac number, because 23424871661 - 2¹⁴ = 23424855277 is a prime.

It is a super-3 number, since 3×23424871661³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23424871621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11712435830 + 11712435831.

It is an arithmetic number, because the mean of its divisors is an integer number (11712435831).

Almost surely, 2^23424871661 is an apocalyptic number.

It is an amenable number.

23424871661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23424871661 is an equidigital number, since it uses as much as digits as its factorization.

23424871661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The spelling of 23424871661 in words is "twenty-three billion, four hundred twenty-four million, eight hundred seventy-one thousand, six hundred sixty-one".