42156031545 has 24 divisors (see below), whose sum is σ = 73076043456. Its totient is φ = 22481497248.

The previous prime is 42156031523. The next prime is 42156031553. The reversal of 42156031545 is 54513065124.

42156031545 is a `hidden beast` number, since 4 + 2 + 1 + 5 + 603 + 1 + 5 + 45 = 666.

It is not a de Polignac number, because 42156031545 - 2⁷ = 42156031417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 747094 + ... + 801536.

It is an arithmetic number, because the mean of its divisors is an integer number (3044835144).

Almost surely, 2^42156031545 is an apocalyptic number.

42156031545 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42156031545 is a deficient number, since it is larger than the sum of its proper divisors (30920011911).

42156031545 is a wasteful number, since it uses less digits than its factorization.

42156031545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71661 (or 71658 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 42156031545 its reverse (54513065124), we get a palindrome (96669096669).

The spelling of 42156031545 in words is "forty-two billion, one hundred fifty-six million, thirty-one thousand, five hundred forty-five".