51616378 has 16 divisors (see below), whose sum is σ = 84595104. Its totient is φ = 23425360.

The previous prime is 51616363. The next prime is 51616379. The reversal of 51616378 is 87361615.

It is not an unprimeable number, because it can be changed into a prime (51616379) 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, 16776 + ... + 19612.

It is an arithmetic number, because the mean of its divisors is an integer number (5287194).

Almost surely, 2^51616378 is an apocalyptic number.

51616378 is a deficient number, since it is larger than the sum of its proper divisors (32978726).

51616378 is a wasteful number, since it uses less digits than its factorization.

51616378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3677.

The product of its digits is 30240, while the sum is 37.

The square root of 51616378 is about 7184.4539110499. The cubic root of 51616378 is about 372.3309816819.

The spelling of 51616378 in words is "fifty-one million, six hundred sixteen thousand, three hundred seventy-eight".