81037354358102 has 4 divisors (see below), whose sum is σ = 121556031537156. Its totient is φ = 40518677179050.

The previous prime is 81037354358087. The next prime is 81037354358113. The reversal of 81037354358102 is 20185345373018.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20259338589524 + ... + 20259338589527.

It is an arithmetic number, because the mean of its divisors is an integer number (30389007884289).

Almost surely, 2^{81037354358102} is an apocalyptic number.

81037354358102 is a deficient number, since it is larger than the sum of its proper divisors (40518677179054).

81037354358102 is a wasteful number, since it uses less digits than its factorization.

81037354358102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40518677179053.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 81037354358102 in words is "eighty-one trillion, thirty-seven billion, three hundred fifty-four million, three hundred fifty-eight thousand, one hundred two".