4861778877251 has 4 divisors (see below), whose sum is σ = 4873903014504. Its totient is φ = 4849654740000.

The previous prime is 4861778877247. The next prime is 4861778877259. The reversal of 4861778877251 is 1527788771684.

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

It is a cyclic number.

It is not a de Polignac number, because 4861778877251 - 2² = 4861778877247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4861778877259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6062068025 + ... + 6062068826.

It is an arithmetic number, because the mean of its divisors is an integer number (1218475753626).

Almost surely, 2^{4861778877251} is an apocalyptic number.

4861778877251 is a deficient number, since it is larger than the sum of its proper divisors (12124137253).

4861778877251 is a wasteful number, since it uses less digits than its factorization.

4861778877251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12124137252.

The product of its digits is 295034880, while the sum is 71.

The spelling of 4861778877251 in words is "four trillion, eight hundred sixty-one billion, seven hundred seventy-eight million, eight hundred seventy-seven thousand, two hundred fifty-one".