42551147623 has 2 divisors, whose sum is σ = 42551147624. Its totient is φ = 42551147622.

The previous prime is 42551147563. The next prime is 42551147627. The reversal of 42551147623 is 32674115524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42551147623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42551147627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21275573811 + 21275573812.

It is an arithmetic number, because the mean of its divisors is an integer number (21275573812).

Almost surely, 2^42551147623 is an apocalyptic number.

42551147623 is a deficient number, since it is larger than the sum of its proper divisors (1).

42551147623 is an equidigital number, since it uses as much as digits as its factorization.

42551147623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 40.

The spelling of 42551147623 in words is "forty-two billion, five hundred fifty-one million, one hundred forty-seven thousand, six hundred twenty-three".