51653958607 has 4 divisors (see below), whose sum is σ = 52025569960. Its totient is φ = 51282347256.

The previous prime is 51653958539. The next prime is 51653958617. The reversal of 51653958607 is 70685935615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70685935615 = 5 ⋅14137187123.

It is a cyclic number.

It is not a de Polignac number, because 51653958607 - 2⁷ = 51653958479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51653958617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185805468 + ... + 185805745.

It is an arithmetic number, because the mean of its divisors is an integer number (13006392490).

Almost surely, 2^51653958607 is an apocalyptic number.

51653958607 is a deficient number, since it is larger than the sum of its proper divisors (371611353).

51653958607 is a wasteful number, since it uses less digits than its factorization.

51653958607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371611352.

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 51653958607 in words is "fifty-one billion, six hundred fifty-three million, nine hundred fifty-eight thousand, six hundred seven".