51777696 has 24 divisors (see below), whose sum is σ = 135916704. Its totient is φ = 17259200.

The previous prime is 51777653. The next prime is 51777697. The reversal of 51777696 is 69677715.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (51777697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269580 + ... + 269771.

It is an arithmetic number, because the mean of its divisors is an integer number (5663196).

Almost surely, 2^51777696 is an apocalyptic number.

It is an amenable number.

51777696 is an abundant number, since it is smaller than the sum of its proper divisors (84139008).

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

51777696 is a wasteful number, since it uses less digits than its factorization.

51777696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539364 (or 539356 counting only the distinct ones).

The product of its digits is 555660, while the sum is 48.

The square root of 51777696 is about 7195.6720325485. The cubic root of 51777696 is about 372.7184635057.

The spelling of 51777696 in words is "fifty-one million, seven hundred seventy-seven thousand, six hundred ninety-six".