87792429778 has 8 divisors (see below), whose sum is σ = 132992492940. Its totient is φ = 43461598800.

The previous prime is 87792429773. The next prime is 87792429793.

87792429778 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 65639977209 + 22152452569 = 256203^2 + 148837^2 .

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

It is a super-2 number, since 2×87792429778² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87792429773) 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, 217307793 + ... + 217308196.

Almost surely, 2^87792429778 is an apocalyptic number.

87792429778 is a deficient number, since it is larger than the sum of its proper divisors (45200063162).

87792429778 is a wasteful number, since it uses less digits than its factorization.

87792429778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434616092.

The product of its digits is 199148544, while the sum is 70.

The spelling of 87792429778 in words is "eighty-seven billion, seven hundred ninety-two million, four hundred twenty-nine thousand, seven hundred seventy-eight".