51155101555599 has 8 divisors (see below), whose sum is σ = 68206888793520. Its totient is φ = 34103357677376.

The previous prime is 51155101555573. The next prime is 51155101555601. The reversal of 51155101555599 is 99555510155115.

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

It is a cyclic number.

It is not a de Polignac number, because 51155101555599 - 2¹⁵ = 51155101522831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155101555559) 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, 7979244 + ... + 12883265.

It is an arithmetic number, because the mean of its divisors is an integer number (8525861099190).

Almost surely, 2^{51155101555599} is an apocalyptic number.

51155101555599 is a deficient number, since it is larger than the sum of its proper divisors (17051787237921).

51155101555599 is a wasteful number, since it uses less digits than its factorization.

51155101555599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21679849.

The product of its (nonzero) digits is 6328125, while the sum is 57.

The spelling of 51155101555599 in words is "fifty-one trillion, one hundred fifty-five billion, one hundred one million, five hundred fifty-five thousand, five hundred ninety-nine".