42495591957 has 128 divisors (see below), whose sum is σ = 77400637440. Its totient is φ = 20109669120.

The previous prime is 42495591949. The next prime is 42495591967. The reversal of 42495591957 is 75919559424.

It is a happy number.

It is not a de Polignac number, because 42495591957 - 2³ = 42495591949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42495591957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42495591947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7554648 + ... + 7560270.

It is an arithmetic number, because the mean of its divisors is an integer number (604692480).

Almost surely, 2^42495591957 is an apocalyptic number.

42495591957 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

42495591957 is a deficient number, since it is larger than the sum of its proper divisors (34905045483).

42495591957 is a wasteful number, since it uses less digits than its factorization.

42495591957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743.

The product of its digits is 20412000, while the sum is 60.

The spelling of 42495591957 in words is "forty-two billion, four hundred ninety-five million, five hundred ninety-one thousand, nine hundred fifty-seven".