42640927415 has 4 divisors (see below), whose sum is σ = 51169112904. Its totient is φ = 34112741928.

The previous prime is 42640927409. The next prime is 42640927457. The reversal of 42640927415 is 51472904624.

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 42640927415 - 2⁸ = 42640927159 is a prime.

It is a super-2 number, since 2×42640927415² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 4264092737 + ... + 4264092746.

It is an arithmetic number, because the mean of its divisors is an integer number (12792278226).

Almost surely, 2^42640927415 is an apocalyptic number.

42640927415 is a deficient number, since it is larger than the sum of its proper divisors (8528185489).

42640927415 is an equidigital number, since it uses as much as digits as its factorization.

42640927415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8528185488.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 42640927415 in words is "forty-two billion, six hundred forty million, nine hundred twenty-seven thousand, four hundred fifteen".