81376554758 has 8 divisors (see below), whose sum is σ = 122249501040. Its totient is φ = 40626721080.

The previous prime is 81376554739. The next prime is 81376554797. The reversal of 81376554758 is 85745567318.

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

It is a junction number, because it is equal to n+sod(n) for n = 81376554697 and 81376554706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30776498 + ... + 30779141.

It is an arithmetic number, because the mean of its divisors is an integer number (15281187630).

Almost surely, 2^81376554758 is an apocalyptic number.

81376554758 is a deficient number, since it is larger than the sum of its proper divisors (40872946282).

81376554758 is a wasteful number, since it uses less digits than its factorization.

81376554758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61556302.

The product of its digits is 28224000, while the sum is 59.

The spelling of 81376554758 in words is "eighty-one billion, three hundred seventy-six million, five hundred fifty-four thousand, seven hundred fifty-eight".