42157529381 has 8 divisors (see below), whose sum is σ = 46445380128. Its totient is φ = 37945570000.

The previous prime is 42157529377. The next prime is 42157529389. The reversal of 42157529381 is 18392575124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42157529381 - 2² = 42157529377 is a prime.

It is a super-2 number, since 2×42157529381² (a number of 22 digits) contains 22 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 (42157529389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18971675 + ... + 18973896.

It is an arithmetic number, because the mean of its divisors is an integer number (5805672516).

Almost surely, 2^42157529381 is an apocalyptic number.

It is an amenable number.

42157529381 is a deficient number, since it is larger than the sum of its proper divisors (4287850747).

42157529381 is a wasteful number, since it uses less digits than its factorization.

42157529381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37945683.

The product of its digits is 604800, while the sum is 47.

The spelling of 42157529381 in words is "forty-two billion, one hundred fifty-seven million, five hundred twenty-nine thousand, three hundred eighty-one".