51749801707 has 4 divisors (see below), whose sum is σ = 52224570640. Its totient is φ = 51275032776.

The previous prime is 51749801669. The next prime is 51749801729. The reversal of 51749801707 is 70710894715.

51749801707 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51749801707 is a prime.

It is a super-2 number, since 2×51749801707² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51749801777) 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, 237384303 + ... + 237384520.

It is an arithmetic number, because the mean of its divisors is an integer number (13056142660).

Almost surely, 2^51749801707 is an apocalyptic number.

51749801707 is a deficient number, since it is larger than the sum of its proper divisors (474768933).

51749801707 is a wasteful number, since it uses less digits than its factorization.

51749801707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474768932.

The product of its (nonzero) digits is 493920, while the sum is 49.

The spelling of 51749801707 in words is "fifty-one billion, seven hundred forty-nine million, eight hundred one thousand, seven hundred seven".