42087257155 has 4 divisors (see below), whose sum is σ = 50504708592. Its totient is φ = 33669805720.

The previous prime is 42087257131. The next prime is 42087257183. The reversal of 42087257155 is 55175278024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 42087257155 - 2¹¹ = 42087255107 is a prime.

It is a Duffinian 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, 4208725711 + ... + 4208725720.

It is an arithmetic number, because the mean of its divisors is an integer number (12626177148).

Almost surely, 2^42087257155 is an apocalyptic number.

42087257155 is a deficient number, since it is larger than the sum of its proper divisors (8417451437).

42087257155 is an equidigital number, since it uses as much as digits as its factorization.

42087257155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8417451436.

The product of its (nonzero) digits is 784000, while the sum is 46.

The spelling of 42087257155 in words is "forty-two billion, eighty-seven million, two hundred fifty-seven thousand, one hundred fifty-five".