145842043581 has 24 divisors (see below), whose sum is σ = 234183645696. Its totient is φ = 86853820320.

The previous prime is 145842043559. The next prime is 145842043603. The reversal of 145842043581 is 185340248541.

145842043581 is a `hidden beast` number, since 1 + 4 + 5 + 8 + 4 + 20 + 43 + 581 = 666.

It is an interprime number because it is at equal distance from previous prime (145842043559) and next prime (145842043603).

It is not a de Polignac number, because 145842043581 - 2¹⁷ = 145841912509 is a prime.

It is a super-2 number, since 2×145842043581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145842042581) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20101425 + ... + 20108678.

It is an arithmetic number, because the mean of its divisors is an integer number (9757651904).

Almost surely, 2^145842043581 is an apocalyptic number.

It is an amenable number.

145842043581 is a deficient number, since it is larger than the sum of its proper divisors (88341602115).

145842043581 is a wasteful number, since it uses less digits than its factorization.

145842043581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40210153 (or 40210150 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 145842043581 in words is "one hundred forty-five billion, eight hundred forty-two million, forty-three thousand, five hundred eighty-one".