51468266381 has 4 divisors (see below), whose sum is σ = 58820875872. Its totient is φ = 44115656892.

The previous prime is 51468266357. The next prime is 51468266387. The reversal of 51468266381 is 18366286415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18366286415 = 5 ⋅3673257283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51468266381 is a prime.

It is a super-2 number, since 2×51468266381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51468266387) 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, 3676304735 + ... + 3676304748.

It is an arithmetic number, because the mean of its divisors is an integer number (14705218968).

Almost surely, 2^51468266381 is an apocalyptic number.

It is an amenable number.

51468266381 is a deficient number, since it is larger than the sum of its proper divisors (7352609491).

51468266381 is an equidigital number, since it uses as much as digits as its factorization.

51468266381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7352609490.

The product of its digits is 1658880, while the sum is 50.

The spelling of 51468266381 in words is "fifty-one billion, four hundred sixty-eight million, two hundred sixty-six thousand, three hundred eighty-one".