51201251378 has 8 divisors (see below), whose sum is σ = 76826830080. Its totient is φ = 25592308020.

The previous prime is 51201251377. The next prime is 51201251393. The reversal of 51201251378 is 87315210215.

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

It is not an unprimeable number, because it can be changed into a prime (51201251377) 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 3 ways as a sum of consecutive naturals, for example, 4151138 + ... + 4163453.

It is an arithmetic number, because the mean of its divisors is an integer number (9603353760).

Almost surely, 2^51201251378 is an apocalyptic number.

51201251378 is a deficient number, since it is larger than the sum of its proper divisors (25625578702).

51201251378 is a wasteful number, since it uses less digits than its factorization.

51201251378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8317672.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 51201251378 in words is "fifty-one billion, two hundred one million, two hundred fifty-one thousand, three hundred seventy-eight".