42686615491 has 8 divisors (see below), whose sum is σ = 45974539184. Its totient is φ = 39399311520.

The previous prime is 42686615471. The next prime is 42686615513. The reversal of 42686615491 is 19451668624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42686615491 - 2⁵ = 42686615459 is a prime.

It is a super-3 number, since 3×42686615491³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42686615471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6600 + ... + 292261.

It is an arithmetic number, because the mean of its divisors is an integer number (5746817398).

Almost surely, 2^42686615491 is an apocalyptic number.

42686615491 is a deficient number, since it is larger than the sum of its proper divisors (3287923693).

42686615491 is a wasteful number, since it uses less digits than its factorization.

42686615491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309861.

The product of its digits is 2488320, while the sum is 52.

The spelling of 42686615491 in words is "forty-two billion, six hundred eighty-six million, six hundred fifteen thousand, four hundred ninety-one".