51655478167 has 8 divisors (see below), whose sum is σ = 51986397600. Its totient is φ = 51324930720.

The previous prime is 51655478131. The next prime is 51655478183. The reversal of 51655478167 is 76187455615.

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-51655478167 is a prime.

It is a super-2 number, since 2×51655478167² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51655478117) 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, 188334 + ... + 372532.

It is an arithmetic number, because the mean of its divisors is an integer number (6498299700).

Almost surely, 2^51655478167 is an apocalyptic number.

51655478167 is a deficient number, since it is larger than the sum of its proper divisors (330919433).

51655478167 is a wasteful number, since it uses less digits than its factorization.

51655478167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185993.

The product of its digits is 7056000, while the sum is 55.

The spelling of 51655478167 in words is "fifty-one billion, six hundred fifty-five million, four hundred seventy-eight thousand, one hundred sixty-seven".