42648187991429 has 2 divisors, whose sum is σ = 42648187991430. Its totient is φ = 42648187991428.

The previous prime is 42648187991371. The next prime is 42648187991459. The reversal of 42648187991429 is 92419978184624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42528005822500 + 120182168929 = 6521350^2 + 346673^2 .

It is a cyclic number.

It is not a de Polignac number, because 42648187991429 - 2³² = 42643893024133 is a prime.

It is a super-2 number, since 2×42648187991429² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42648187991459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21324093995714 + 21324093995715.

It is an arithmetic number, because the mean of its divisors is an integer number (21324093995715).

Almost surely, 2^{42648187991429} is an apocalyptic number.

It is an amenable number.

42648187991429 is a deficient number, since it is larger than the sum of its proper divisors (1).

42648187991429 is an equidigital number, since it uses as much as digits as its factorization.

42648187991429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 501645312, while the sum is 74.

The spelling of 42648187991429 in words is "forty-two trillion, six hundred forty-eight billion, one hundred eighty-seven million, nine hundred ninety-one thousand, four hundred twenty-nine".