51283959693 has 16 divisors (see below), whose sum is σ = 70085990016. Its totient is φ = 33343344320.

The previous prime is 51283959673. The next prime is 51283959707. The reversal of 51283959693 is 39695938215.

It is a cyclic number.

It is not a de Polignac number, because 51283959693 - 2²² = 51279765389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51283959613) 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, 939138 + ... + 992243.

It is an arithmetic number, because the mean of its divisors is an integer number (4380374376).

Almost surely, 2^51283959693 is an apocalyptic number.

51283959693 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

It is an amenable number.

51283959693 is a deficient number, since it is larger than the sum of its proper divisors (18802030323).

51283959693 is a wasteful number, since it uses less digits than its factorization.

51283959693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931604.

The product of its digits is 15746400, while the sum is 60.

The spelling of 51283959693 in words is "fifty-one billion, two hundred eighty-three million, nine hundred fifty-nine thousand, six hundred ninety-three".