51778670 has 16 divisors (see below), whose sum is σ = 93719808. Its totient is φ = 20596320.

The previous prime is 51778621. The next prime is 51778673. The reversal of 51778670 is 7687715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51778673) 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, 12494 + ... + 16113.

It is an arithmetic number, because the mean of its divisors is an integer number (5857488).

Almost surely, 2^51778670 is an apocalyptic number.

51778670 is a deficient number, since it is larger than the sum of its proper divisors (41941138).

51778670 is a wasteful number, since it uses less digits than its factorization.

51778670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28795.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 51778670 is about 7195.7397118017. The cubic root of 51778670 is about 372.7208005835.

The spelling of 51778670 in words is "fifty-one million, seven hundred seventy-eight thousand, six hundred seventy".