42515757617 has 4 divisors (see below), whose sum is σ = 42631604736. Its totient is φ = 42399910500.

The previous prime is 42515757593. The next prime is 42515757619. The reversal of 42515757617 is 71675751524.

It is a happy number.

42515757617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42515757617 - 2¹² = 42515753521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42515757619) 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, 57923009 + ... + 57923742.

It is an arithmetic number, because the mean of its divisors is an integer number (10657901184).

Almost surely, 2^42515757617 is an apocalyptic number.

It is an amenable number.

42515757617 is a deficient number, since it is larger than the sum of its proper divisors (115847119).

42515757617 is a wasteful number, since it uses less digits than its factorization.

42515757617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115847118.

The product of its digits is 2058000, while the sum is 50.

The spelling of 42515757617 in words is "forty-two billion, five hundred fifteen million, seven hundred fifty-seven thousand, six hundred seventeen".