42545646551121 has 32 divisors (see below), whose sum is σ = 64900638194688. Its totient is φ = 24285869699520.

The previous prime is 42545646551117. The next prime is 42545646551147. The reversal of 42545646551121 is 12115564654524.

It is not a de Polignac number, because 42545646551121 - 2² = 42545646551117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42545646501121) 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, 79086370 + ... + 79622516.

It is an arithmetic number, because the mean of its divisors is an integer number (2028144943584).

Almost surely, 2^{42545646551121} is an apocalyptic number.

It is an amenable number.

42545646551121 is a deficient number, since it is larger than the sum of its proper divisors (22354991643567).

42545646551121 is a wasteful number, since it uses less digits than its factorization.

42545646551121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540181.

The product of its digits is 5760000, while the sum is 51.

The spelling of 42545646551121 in words is "forty-two trillion, five hundred forty-five billion, six hundred forty-six million, five hundred fifty-one thousand, one hundred twenty-one".