42455445123 has 32 divisors (see below), whose sum is σ = 70171763200. Its totient is φ = 22232952576.

The previous prime is 42455445079. The next prime is 42455445139. The reversal of 42455445123 is 32154455424.

It is not a de Polignac number, because 42455445123 - 2⁶ = 42455445059 is a prime.

It is a super-3 number, since 3×42455445123³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (42455445323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 521458 + ... + 597351.

It is an arithmetic number, because the mean of its divisors is an integer number (2192867600).

Almost surely, 2^42455445123 is an apocalyptic number.

42455445123 is a deficient number, since it is larger than the sum of its proper divisors (27716318077).

42455445123 is a wasteful number, since it uses less digits than its factorization.

42455445123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118971.

The product of its digits is 384000, while the sum is 39.

It can be divided in two parts, 42455 and 445123, that added together give a triangular number (487578 = T₉₈₇).

The spelling of 42455445123 in words is "forty-two billion, four hundred fifty-five million, four hundred forty-five thousand, one hundred twenty-three".