51335165378 has 32 divisors (see below), whose sum is σ = 89696937600. Its totient is φ = 21577645440.

The previous prime is 51335165377. The next prime is 51335165419. The reversal of 51335165378 is 87356153315.

It is not an unprimeable number, because it can be changed into a prime (51335165377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2251013 + ... + 2273703.

It is an arithmetic number, because the mean of its divisors is an integer number (2803029300).

Almost surely, 2^51335165378 is an apocalyptic number.

51335165378 is a deficient number, since it is larger than the sum of its proper divisors (38361772222).

51335165378 is a wasteful number, since it uses less digits than its factorization.

51335165378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25802.

The product of its digits is 1134000, while the sum is 47.

The spelling of 51335165378 in words is "fifty-one billion, three hundred thirty-five million, one hundred sixty-five thousand, three hundred seventy-eight".