83621455412638 has 16 divisors (see below), whose sum is σ = 147360886461936. Its totient is φ = 35085925347840.

The previous prime is 83621455412633. The next prime is 83621455412773.

It is a happy number.

83621455412638 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83621455412633) 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 in 7 ways as a sum of consecutive naturals, for example, 146191355331 + ... + 146191355902.

It is an arithmetic number, because the mean of its divisors is an integer number (9210055403871).

Almost surely, 2^{83621455412638} is an apocalyptic number.

83621455412638 is a deficient number, since it is larger than the sum of its proper divisors (63739431049298).

83621455412638 is a wasteful number, since it uses less digits than its factorization.

83621455412638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292382711259.

The product of its digits is 33177600, while the sum is 58.

The spelling of 83621455412638 in words is "eighty-three trillion, six hundred twenty-one billion, four hundred fifty-five million, four hundred twelve thousand, six hundred thirty-eight".