42897638745 has 64 divisors (see below), whose sum is σ = 83285798400. Its totient is φ = 20821328640.

The previous prime is 42897638737. The next prime is 42897638747. The reversal of 42897638745 is 54783679824.

42897638745 is a `hidden beast` number, since 428 + 97 + 6 + 3 + 87 + 45 = 666.

It is not a de Polignac number, because 42897638745 - 2³ = 42897638737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42897638747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47530 + ... + 296739.

It is an arithmetic number, because the mean of its divisors is an integer number (1301340600).

Almost surely, 2^42897638745 is an apocalyptic number.

42897638745 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42897638745 is a deficient number, since it is larger than the sum of its proper divisors (40388159655).

42897638745 is a wasteful number, since it uses less digits than its factorization.

42897638745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344367 (or 344361 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 42897638745 in words is "forty-two billion, eight hundred ninety-seven million, six hundred thirty-eight thousand, seven hundred forty-five".