51155633263 has 16 divisors (see below), whose sum is σ = 60087849984. Its totient is φ = 42641370720.

The previous prime is 51155633261. The next prime is 51155633297. The reversal of 51155633263 is 36233655115.

It is a cyclic number.

It is not a de Polignac number, because 51155633263 - 2¹ = 51155633261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155633261) 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 15 ways as a sum of consecutive naturals, for example, 443533 + ... + 546838.

It is an arithmetic number, because the mean of its divisors is an integer number (3755490624).

Almost surely, 2^51155633263 is an apocalyptic number.

51155633263 is a deficient number, since it is larger than the sum of its proper divisors (8932216721).

51155633263 is a wasteful number, since it uses less digits than its factorization.

51155633263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990582.

The product of its digits is 243000, while the sum is 40.

The spelling of 51155633263 in words is "fifty-one billion, one hundred fifty-five million, six hundred thirty-three thousand, two hundred sixty-three".