76820411869 has 8 divisors (see below), whose sum is σ = 81386226360. Its totient is φ = 72259815936.

The previous prime is 76820411807. The next prime is 76820411881. The reversal of 76820411869 is 96811402867.

It can be written as a sum of positive squares in 4 ways, for example, as 35574863769 + 41245548100 = 188613^2 + 203090^2 .

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

It is not a de Polignac number, because 76820411869 - 2¹³ = 76820403677 is a prime.

It is a super-2 number, since 2×76820411869² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76820415869) 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, 1274304 + ... + 1333225.

It is an arithmetic number, because the mean of its divisors is an integer number (10173278295).

Almost surely, 2^76820411869 is an apocalyptic number.

It is an amenable number.

76820411869 is a deficient number, since it is larger than the sum of its proper divisors (4565814491).

76820411869 is a wasteful number, since it uses less digits than its factorization.

76820411869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609279.

The product of its (nonzero) digits is 1161216, while the sum is 52.

The spelling of 76820411869 in words is "seventy-six billion, eight hundred twenty million, four hundred eleven thousand, eight hundred sixty-nine".