51148691801 has 8 divisors (see below), whose sum is σ = 51338295240. Its totient is φ = 50959438848.

The previous prime is 51148691773. The next prime is 51148691807. The reversal of 51148691801 is 10819684115.

It can be written as a sum of positive squares in 4 ways, for example, as 23642137600 + 27506554201 = 153760^2 + 165851^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51148691801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51148691807) 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 7 ways as a sum of consecutive naturals, for example, 206615 + ... + 380771.

It is an arithmetic number, because the mean of its divisors is an integer number (6417286905).

Almost surely, 2^51148691801 is an apocalyptic number.

It is an amenable number.

51148691801 is a deficient number, since it is larger than the sum of its proper divisors (189603439).

51148691801 is a wasteful number, since it uses less digits than its factorization.

51148691801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175243.

The product of its (nonzero) digits is 69120, while the sum is 44.

The spelling of 51148691801 in words is "fifty-one billion, one hundred forty-eight million, six hundred ninety-one thousand, eight hundred one".