42451629561 has 12 divisors (see below), whose sum is σ = 66893477040. Its totient is φ = 25728260280.

The previous prime is 42451629547. The next prime is 42451629599. The reversal of 42451629561 is 16592615424.

42451629561 is a `hidden beast` number, since 4 + 24 + 5 + 1 + 62 + 9 + 561 = 666.

It is not a de Polignac number, because 42451629561 - 2¹⁰ = 42451628537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42451629541) 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 11 ways as a sum of consecutive naturals, for example, 214402071 + ... + 214402268.

It is an arithmetic number, because the mean of its divisors is an integer number (5574456420).

Almost surely, 2^42451629561 is an apocalyptic number.

It is an amenable number.

42451629561 is a deficient number, since it is larger than the sum of its proper divisors (24441847479).

42451629561 is a wasteful number, since it uses less digits than its factorization.

42451629561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428804356 (or 428804353 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The spelling of 42451629561 in words is "forty-two billion, four hundred fifty-one million, six hundred twenty-nine thousand, five hundred sixty-one".