51151121655 has 8 divisors (see below), whose sum is σ = 81841794672. Its totient is φ = 27280598208.

The previous prime is 51151121629. The next prime is 51151121683. The reversal of 51151121655 is 55612115115.

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

It is not a de Polignac number, because 51151121655 - 2¹⁶ = 51151056119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705037374 + ... + 1705037403.

It is an arithmetic number, because the mean of its divisors is an integer number (10230224334).

Almost surely, 2^51151121655 is an apocalyptic number.

51151121655 is a deficient number, since it is larger than the sum of its proper divisors (30690673017).

51151121655 is a wasteful number, since it uses less digits than its factorization.

51151121655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410074785.

The product of its digits is 7500, while the sum is 33.

The spelling of 51151121655 in words is "fifty-one billion, one hundred fifty-one million, one hundred twenty-one thousand, six hundred fifty-five".