42451312564 has 24 divisors (see below), whose sum is σ = 76307122080. Its totient is φ = 20649420576.

The previous prime is 42451312559. The next prime is 42451312613. The reversal of 42451312564 is 46521315424.

It is a super-2 number, since 2×42451312564² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1797867 + ... + 1821325.

It is an arithmetic number, because the mean of its divisors is an integer number (3179463420).

Almost surely, 2^42451312564 is an apocalyptic number.

It is an amenable number.

42451312564 is a deficient number, since it is larger than the sum of its proper divisors (33855809516).

42451312564 is a wasteful number, since it uses less digits than its factorization.

42451312564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35727 (or 35725 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

Adding to 42451312564 its reverse (46521315424), we get a palindrome (88972627988).

The spelling of 42451312564 in words is "forty-two billion, four hundred fifty-one million, three hundred twelve thousand, five hundred sixty-four".