42661355515 has 4 divisors (see below), whose sum is σ = 51193626624. Its totient is φ = 34129084408.

The previous prime is 42661355507. The next prime is 42661355537. The reversal of 42661355515 is 51555316624.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42661355515 - 2³ = 42661355507 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4266135547 + ... + 4266135556.

It is an arithmetic number, because the mean of its divisors is an integer number (12798406656).

Almost surely, 2^42661355515 is an apocalyptic number.

42661355515 is a deficient number, since it is larger than the sum of its proper divisors (8532271109).

42661355515 is an equidigital number, since it uses as much as digits as its factorization.

42661355515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8532271108.

The product of its digits is 540000, while the sum is 43.

The spelling of 42661355515 in words is "forty-two billion, six hundred sixty-one million, three hundred fifty-five thousand, five hundred fifteen".