51264251403555 has 8 divisors (see below), whose sum is σ = 82022802245712. Its totient is φ = 27340934081888.

The previous prime is 51264251403473. The next prime is 51264251403559. The reversal of 51264251403555 is 55530415246215.

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 51264251403555 - 2¹⁶ = 51264251338019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51264251403559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708808380104 + ... + 1708808380133.

It is an arithmetic number, because the mean of its divisors is an integer number (10252850280714).

Almost surely, 2^{51264251403555} is an apocalyptic number.

51264251403555 is a deficient number, since it is larger than the sum of its proper divisors (30758550842157).

51264251403555 is a wasteful number, since it uses less digits than its factorization.

51264251403555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3417616760245.

The product of its (nonzero) digits is 3600000, while the sum is 48.

The spelling of 51264251403555 in words is "fifty-one trillion, two hundred sixty-four billion, two hundred fifty-one million, four hundred three thousand, five hundred fifty-five".