87356431650626 has 4 divisors (see below), whose sum is σ = 131034647475942. Its totient is φ = 43678215825312.

The previous prime is 87356431650589. The next prime is 87356431650629. The reversal of 87356431650626 is 62605613465378.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 57801062495401 + 29555369155225 = 7602701^2 + 5436485^2 .

It is a super-2 number, since 2×87356431650626² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87356431650629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21839107912655 + ... + 21839107912658.

Almost surely, 2^{87356431650626} is an apocalyptic number.

87356431650626 is a deficient number, since it is larger than the sum of its proper divisors (43678215825316).

87356431650626 is a wasteful number, since it uses less digits than its factorization.

87356431650626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43678215825315.

The product of its (nonzero) digits is 130636800, while the sum is 62.

The spelling of 87356431650626 in words is "eighty-seven trillion, three hundred fifty-six billion, four hundred thirty-one million, six hundred fifty thousand, six hundred twenty-six".