42451423041397 has 2 divisors, whose sum is σ = 42451423041398. Its totient is φ = 42451423041396.

The previous prime is 42451423041383. The next prime is 42451423041407. The reversal of 42451423041397 is 79314032415424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39506077168996 + 2945345872401 = 6285386^2 + 1716201^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42451423041397 is a prime.

It is a super-3 number, since 3×42451423041397³ (a number of 42 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42451423041397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42451423041497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21225711520698 + 21225711520699.

It is an arithmetic number, because the mean of its divisors is an integer number (21225711520699).

Almost surely, 2^{42451423041397} is an apocalyptic number.

It is an amenable number.

42451423041397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42451423041397 is an equidigital number, since it uses as much as digits as its factorization.

42451423041397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 49.

The spelling of 42451423041397 in words is "forty-two trillion, four hundred fifty-one billion, four hundred twenty-three million, forty-one thousand, three hundred ninety-seven".