51291923602 has 8 divisors (see below), whose sum is σ = 77454247500. Its totient is φ = 25473841104.

The previous prime is 51291923591. The next prime is 51291923603. The reversal of 51291923602 is 20632919215.

51291923602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47167586761 + 4124336841 = 217181^2 + 64221^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51291923602² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51291923603) 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, 86059977 + ... + 86060572.

Almost surely, 2^51291923602 is an apocalyptic number.

51291923602 is a deficient number, since it is larger than the sum of its proper divisors (26162323898).

51291923602 is a wasteful number, since it uses less digits than its factorization.

51291923602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172120700.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 51291923602 in words is "fifty-one billion, two hundred ninety-one million, nine hundred twenty-three thousand, six hundred two".