51726551730 has 64 divisors (see below), whose sum is σ = 148047187968. Its totient is φ = 11309158080.

The previous prime is 51726551717. The next prime is 51726551731. The reversal of 51726551730 is 3715562715.

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

It is not an unprimeable number, because it can be changed into a prime (51726551731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5349886 + ... + 5359545.

It is an arithmetic number, because the mean of its divisors is an integer number (2313237312).

Almost surely, 2^51726551730 is an apocalyptic number.

51726551730 is an abundant number, since it is smaller than the sum of its proper divisors (96320636238).

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

51726551730 is a wasteful number, since it uses less digits than its factorization.

51726551730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709471.

The product of its (nonzero) digits is 220500, while the sum is 42.

The spelling of 51726551730 in words is "fifty-one billion, seven hundred twenty-six million, five hundred fifty-one thousand, seven hundred thirty".