51962711645 has 16 divisors (see below), whose sum is σ = 67182342192. Its totient is φ = 38355018240.

The previous prime is 51962711641. The next prime is 51962711653. The reversal of 51962711645 is 54611726915.

It can be written as a sum of positive squares in 8 ways, for example, as 3447803524 + 48514908121 = 58718^2 + 220261^2 .

It is not a de Polignac number, because 51962711645 - 2² = 51962711641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51962711645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51962711641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36776 + ... + 324465.

It is an arithmetic number, because the mean of its divisors is an integer number (4198896387).

Almost surely, 2^51962711645 is an apocalyptic number.

It is an amenable number.

51962711645 is a deficient number, since it is larger than the sum of its proper divisors (15219630547).

51962711645 is a wasteful number, since it uses less digits than its factorization.

51962711645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363472.

The product of its digits is 453600, while the sum is 47.

The spelling of 51962711645 in words is "fifty-one billion, nine hundred sixty-two million, seven hundred eleven thousand, six hundred forty-five".