51423546445 has 4 divisors (see below), whose sum is σ = 61708255740. Its totient is φ = 41138837152.

The previous prime is 51423546407. The next prime is 51423546451. The reversal of 51423546445 is 54464532415.

51423546445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54464532415 = 5 ⋅10892906483.

It can be written as a sum of positive squares in 2 ways, for example, as 36636256836 + 14787289609 = 191406^2 + 121603^2 .

It is a cyclic number.

It is not a de Polignac number, because 51423546445 - 2⁹ = 51423545933 is a prime.

It is a super-2 number, since 2×51423546445² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142354640 + ... + 5142354649.

It is an arithmetic number, because the mean of its divisors is an integer number (15427063935).

Almost surely, 2^51423546445 is an apocalyptic number.

It is an amenable number.

51423546445 is a deficient number, since it is larger than the sum of its proper divisors (10284709295).

51423546445 is a wasteful number, since it uses less digits than its factorization.

51423546445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10284709294.

The product of its digits is 1152000, while the sum is 43.

The spelling of 51423546445 in words is "fifty-one billion, four hundred twenty-three million, five hundred forty-six thousand, four hundred forty-five".