51702420457 has 4 divisors (see below), whose sum is σ = 51703459920. Its totient is φ = 51701380996.

The previous prime is 51702420431. The next prime is 51702420481. The reversal of 51702420457 is 75402420715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51702420457 - 2²³ = 51694031849 is a prime.

It is a super-2 number, since 2×51702420457² (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 (51702420487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441163 + ... + 545920.

It is an arithmetic number, because the mean of its divisors is an integer number (12925864980).

Almost surely, 2^51702420457 is an apocalyptic number.

It is an amenable number.

51702420457 is a deficient number, since it is larger than the sum of its proper divisors (1039463).

51702420457 is an equidigital number, since it uses as much as digits as its factorization.

51702420457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039462.

The product of its (nonzero) digits is 78400, while the sum is 37.

The spelling of 51702420457 in words is "fifty-one billion, seven hundred two million, four hundred twenty thousand, four hundred fifty-seven".