42401437697 has 2 divisors, whose sum is σ = 42401437698. Its totient is φ = 42401437696.

The previous prime is 42401437657. The next prime is 42401437709. The reversal of 42401437697 is 79673410424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35995196176 + 6406241521 = 189724^2 + 80039^2 .

It is a cyclic number.

It is not a de Polignac number, because 42401437697 - 2²⁰ = 42400389121 is a prime.

It is not a weakly prime, because it can be changed into another prime (42401437657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200718848 + 21200718849.

It is an arithmetic number, because the mean of its divisors is an integer number (21200718849).

Almost surely, 2^42401437697 is an apocalyptic number.

It is an amenable number.

42401437697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42401437697 is an equidigital number, since it uses as much as digits as its factorization.

42401437697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 42401437697 in words is "forty-two billion, four hundred one million, four hundred thirty-seven thousand, six hundred ninety-seven".