83121353475028 has 72 divisors (see below), whose sum is σ = 168644735781984. Its totient is φ = 35544127680000.

The previous prime is 83121353475023. The next prime is 83121353475029. The reversal of 83121353475028 is 82057435312138.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83121353475023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27171750 + ... + 30075682.

It is an arithmetic number, because the mean of its divisors is an integer number (2342287996972).

Almost surely, 2^{83121353475028} is an apocalyptic number.

It is an amenable number.

83121353475028 is an abundant number, since it is smaller than the sum of its proper divisors (85523382306956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83121353475028 is a wasteful number, since it uses less digits than its factorization.

83121353475028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906233 (or 2906214 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 83121353475028 in words is "eighty-three trillion, one hundred twenty-one billion, three hundred fifty-three million, four hundred seventy-five thousand, twenty-eight".