51768654 has 64 divisors (see below), whose sum is σ = 128908800. Its totient is φ = 13523328.

The previous prime is 51768649. The next prime is 51768671. The reversal of 51768654 is 45686715.

51768654 = 463² + 464² + ... + 633².

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22024 + ... + 24260.

It is an arithmetic number, because the mean of its divisors is an integer number (2014200).

Almost surely, 2^51768654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51768654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64454400).

51768654 is an abundant number, since it is smaller than the sum of its proper divisors (77140146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51768654 is a wasteful number, since it uses less digits than its factorization.

51768654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297.

The product of its digits is 201600, while the sum is 42.

The square root of 51768654 is about 7195.0437107776. The cubic root of 51768654 is about 372.6967661546.

The spelling of 51768654 in words is "fifty-one million, seven hundred sixty-eight thousand, six hundred fifty-four".