51662256509 has 8 divisors (see below), whose sum is σ = 54580815360. Its totient is φ = 48819504496.

The previous prime is 51662256497. The next prime is 51662256533. The reversal of 51662256509 is 90565226615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51662256509 - 2¹⁶ = 51662190973 is a prime.

It is a super-3 number, since 3×51662256509³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662216509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18950309 + ... + 18953034.

It is an arithmetic number, because the mean of its divisors is an integer number (6822601920).

Almost surely, 2^51662256509 is an apocalyptic number.

It is an amenable number.

51662256509 is a deficient number, since it is larger than the sum of its proper divisors (2918558851).

51662256509 is a wasteful number, since it uses less digits than its factorization.

51662256509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37903419.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 51662256509 in words is "fifty-one billion, six hundred sixty-two million, two hundred fifty-six thousand, five hundred nine".