51395007945 has 16 divisors (see below), whose sum is σ = 82252300032. Its totient is φ = 27403908480.

The previous prime is 51395007931. The next prime is 51395007947. The reversal of 51395007945 is 54970059315.

It is not a de Polignac number, because 51395007945 - 2¹⁶ = 51394942409 is a prime.

It is a super-3 number, since 3×51395007945³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 51395007894 and 51395007903.

It is not an unprimeable number, because it can be changed into a prime (51395007947) 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, 359521 + ... + 481710.

It is an arithmetic number, because the mean of its divisors is an integer number (5140768752).

Almost surely, 2^51395007945 is an apocalyptic number.

It is an amenable number.

51395007945 is a deficient number, since it is larger than the sum of its proper divisors (30857292087).

51395007945 is a wasteful number, since it uses less digits than its factorization.

51395007945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845312.

The product of its (nonzero) digits is 850500, while the sum is 48.

The spelling of 51395007945 in words is "fifty-one billion, three hundred ninety-five million, seven thousand, nine hundred forty-five".