51910046545 has 24 divisors (see below), whose sum is σ = 74960893800. Its totient is φ = 34368026112.

The previous prime is 51910046537. The next prime is 51910046549. The reversal of 51910046545 is 54564001915.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20505953601 + 31404092944 = 143199^2 + 177212^2 .

It is not a de Polignac number, because 51910046545 - 2³ = 51910046537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51910046498 and 51910046507.

It is not an unprimeable number, because it can be changed into a prime (51910046549) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3645960 + ... + 3660169.

It is an arithmetic number, because the mean of its divisors is an integer number (3123370575).

Almost surely, 2^51910046545 is an apocalyptic number.

It is an amenable number.

51910046545 is a deficient number, since it is larger than the sum of its proper divisors (23050847255).

51910046545 is a wasteful number, since it uses less digits than its factorization.

51910046545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7306177 (or 7306170 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 51910046545 in words is "fifty-one billion, nine hundred ten million, forty-six thousand, five hundred forty-five".