61287525851 has 8 divisors (see below), whose sum is σ = 63954896640. Its totient is φ = 58620379752.

The previous prime is 61287525847. The next prime is 61287525863. The reversal of 61287525851 is 15852578216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61287525851 - 2² = 61287525847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61287525851.

It is not an unprimeable number, because it can be changed into a prime (61287525881) 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 7 ways as a sum of consecutive naturals, for example, 743756 + ... + 822038.

It is an arithmetic number, because the mean of its divisors is an integer number (7994362080).

Almost surely, 2^61287525851 is an apocalyptic number.

61287525851 is a deficient number, since it is larger than the sum of its proper divisors (2667370789).

61287525851 is a wasteful number, since it uses less digits than its factorization.

61287525851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112345.

The product of its digits is 1344000, while the sum is 50.

The spelling of 61287525851 in words is "sixty-one billion, two hundred eighty-seven million, five hundred twenty-five thousand, eight hundred fifty-one".