61028863751 has 4 divisors (see below), whose sum is σ = 61032285600. Its totient is φ = 61025441904.

The previous prime is 61028863729. The next prime is 61028863801. The reversal of 61028863751 is 15736882016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61028863751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61028863696 and 61028863705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61028863351) 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 3 ways as a sum of consecutive naturals, for example, 1684031 + ... + 1719888.

It is an arithmetic number, because the mean of its divisors is an integer number (15258071400).

Almost surely, 2^61028863751 is an apocalyptic number.

61028863751 is a deficient number, since it is larger than the sum of its proper divisors (3421849).

61028863751 is a wasteful number, since it uses less digits than its factorization.

61028863751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421848.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 61028863751 in words is "sixty-one billion, twenty-eight million, eight hundred sixty-three thousand, seven hundred fifty-one".