51154735551391 has 32 divisors (see below), whose sum is σ = 55246105313280. Its totient is φ = 47248473612384.

The previous prime is 51154735551341. The next prime is 51154735551421. The reversal of 51154735551391 is 19315553745115.

It is a happy number.

It is not a de Polignac number, because 51154735551391 - 2⁷ = 51154735551263 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 (51154735551341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65919546 + ... + 66691048.

It is an arithmetic number, because the mean of its divisors is an integer number (1726440791040).

Almost surely, 2^{51154735551391} is an apocalyptic number.

51154735551391 is a deficient number, since it is larger than the sum of its proper divisors (4091369761889).

51154735551391 is a wasteful number, since it uses less digits than its factorization.

51154735551391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772395.

The product of its digits is 7087500, while the sum is 55.

The spelling of 51154735551391 in words is "fifty-one trillion, one hundred fifty-four billion, seven hundred thirty-five million, five hundred fifty-one thousand, three hundred ninety-one".