51601211895 has 8 divisors (see below), whose sum is σ = 82561939056. Its totient is φ = 27520646336.

The previous prime is 51601211881. The next prime is 51601211897. The reversal of 51601211895 is 59811210615.

It is a happy number.

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 51601211895 - 2⁸ = 51601211639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51601211897) 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, 1720040382 + ... + 1720040411.

It is an arithmetic number, because the mean of its divisors is an integer number (10320242382).

Almost surely, 2^51601211895 is an apocalyptic number.

51601211895 is a deficient number, since it is larger than the sum of its proper divisors (30960727161).

51601211895 is a wasteful number, since it uses less digits than its factorization.

51601211895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440080801.

The product of its (nonzero) digits is 21600, while the sum is 39.

The spelling of 51601211895 in words is "fifty-one billion, six hundred one million, two hundred eleven thousand, eight hundred ninety-five".