42685645815149 has 4 divisors (see below), whose sum is σ = 42763681731264. Its totient is φ = 42607609899036.

The previous prime is 42685645815097. The next prime is 42685645815161. The reversal of 42685645815149 is 94151854658624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42685645815149 - 2⁴⁴ = 25093459770733 is a prime.

It is a super-3 number, since 3×42685645815149³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42685645815049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39017957237 + ... + 39017958330.

It is an arithmetic number, because the mean of its divisors is an integer number (10690920432816).

Almost surely, 2^{42685645815149} is an apocalyptic number.

It is an amenable number.

42685645815149 is a deficient number, since it is larger than the sum of its proper divisors (78035916115).

42685645815149 is an equidigital number, since it uses as much as digits as its factorization.

42685645815149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78035916114.

The product of its digits is 331776000, while the sum is 68.

The spelling of 42685645815149 in words is "forty-two trillion, six hundred eighty-five billion, six hundred forty-five million, eight hundred fifteen thousand, one hundred forty-nine".