42377815720581 has 32 divisors (see below), whose sum is σ = 61699068887040. Its totient is φ = 25659113385600.

The previous prime is 42377815720571. The next prime is 42377815720589. The reversal of 42377815720581 is 18502751877324.

It is not a de Polignac number, because 42377815720581 - 2¹³ = 42377815712389 is a prime.

It is a super-2 number, since 2×42377815720581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42377815720589) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184432636 + ... + 184662266.

It is an arithmetic number, because the mean of its divisors is an integer number (1928095902720).

Almost surely, 2^{42377815720581} is an apocalyptic number.

It is an amenable number.

42377815720581 is a deficient number, since it is larger than the sum of its proper divisors (19321253166459).

42377815720581 is a wasteful number, since it uses less digits than its factorization.

42377815720581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234937.

The product of its (nonzero) digits is 26342400, while the sum is 60.

The spelling of 42377815720581 in words is "forty-two trillion, three hundred seventy-seven billion, eight hundred fifteen million, seven hundred twenty thousand, five hundred eighty-one".