42645816526 has 16 divisors (see below), whose sum is σ = 64748200608. Its totient is φ = 21064644000.

The previous prime is 42645816523. The next prime is 42645816529. The reversal of 42645816526 is 62561854624.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (42645816523) and next prime (42645816529).

It is a self number, because there is not a number n which added to its sum of digits gives 42645816526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42645816523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335425 + ... + 444748.

It is an arithmetic number, because the mean of its divisors is an integer number (4046762538).

Almost surely, 2^42645816526 is an apocalyptic number.

42645816526 is a deficient number, since it is larger than the sum of its proper divisors (22102384082).

42645816526 is a wasteful number, since it uses less digits than its factorization.

42645816526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780507.

The product of its digits is 2764800, while the sum is 49.

The spelling of 42645816526 in words is "forty-two billion, six hundred forty-five million, eight hundred sixteen thousand, five hundred twenty-six".