820471462757 has 8 divisors (see below), whose sum is σ = 873936495936. Its totient is φ = 767584430272.

The previous prime is 820471462721. The next prime is 820471462807. The reversal of 820471462757 is 757264174028.

It is a happy number.

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 820471462757 - 2¹² = 820471458661 is a prime.

It is a super-2 number, since 2×820471462757² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820471462699 and 820471462708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820471467757) 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, 144497243 + ... + 144502920.

It is an arithmetic number, because the mean of its divisors is an integer number (109242061992).

Almost surely, 2^820471462757 is an apocalyptic number.

It is an amenable number.

820471462757 is a deficient number, since it is larger than the sum of its proper divisors (53465033179).

820471462757 is a wasteful number, since it uses less digits than its factorization.

820471462757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289000347.

The product of its (nonzero) digits is 5268480, while the sum is 53.

The spelling of 820471462757 in words is "eight hundred twenty billion, four hundred seventy-one million, four hundred sixty-two thousand, seven hundred fifty-seven".