42512450661 has 24 divisors (see below), whose sum is σ = 63655978464. Its totient is φ = 27317904480.

The previous prime is 42512450641. The next prime is 42512450677. The reversal of 42512450661 is 16605421524.

42512450661 is a `hidden beast` number, since 4 + 25 + 124 + 506 + 6 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-42512450661 is a prime.

It is a super-2 number, since 2×42512450661² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42512450611) 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 23 ways as a sum of consecutive naturals, for example, 560935 + ... + 632196.

It is an arithmetic number, because the mean of its divisors is an integer number (2652332436).

Almost surely, 2^42512450661 is an apocalyptic number.

It is an amenable number.

42512450661 is a deficient number, since it is larger than the sum of its proper divisors (21143527803).

42512450661 is a wasteful number, since it uses less digits than its factorization.

42512450661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193281 (or 1193278 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 42512450661 in words is "forty-two billion, five hundred twelve million, four hundred fifty thousand, six hundred sixty-one".