51809000254 has 16 divisors (see below), whose sum is σ = 85084433136. Its totient is φ = 23464526400.

The previous prime is 51809000251. The next prime is 51809000293. The reversal of 51809000254 is 45200090815.

It is a pancake number, because a pancake can be divided into 51809000254 parts by 321897 straight cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51809000251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4244727 + ... + 4256914.

It is an arithmetic number, because the mean of its divisors is an integer number (5317777071).

Almost surely, 2^51809000254 is an apocalyptic number.

51809000254 is a deficient number, since it is larger than the sum of its proper divisors (33275432882).

51809000254 is a wasteful number, since it uses less digits than its factorization.

51809000254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501931.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 51809000254 in words is "fifty-one billion, eight hundred nine million, two hundred fifty-four", and thus it is an aban number.