51056556105149 has 4 divisors (see below), whose sum is σ = 58350349834464. Its totient is φ = 43762762375836.

The previous prime is 51056556105109. The next prime is 51056556105173. The reversal of 51056556105149 is 94150165565015.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 51056556105149 - 2¹² = 51056556101053 is a prime.

It is a super-3 number, since 3×51056556105149³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51056556105149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51056556105109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3646896864647 + ... + 3646896864660.

It is an arithmetic number, because the mean of its divisors is an integer number (14587587458616).

Almost surely, 2^{51056556105149} is an apocalyptic number.

It is an amenable number.

51056556105149 is a deficient number, since it is larger than the sum of its proper divisors (7293793729315).

51056556105149 is an equidigital number, since it uses as much as digits as its factorization.

51056556105149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7293793729314.

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 51056556105149 in words is "fifty-one trillion, fifty-six billion, five hundred fifty-six million, one hundred five thousand, one hundred forty-nine".