81933556070 has 8 divisors (see below), whose sum is σ = 147480400944. Its totient is φ = 32773422424.

The previous prime is 81933556057. The next prime is 81933556123. The reversal of 81933556070 is 7065533918.

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

It is a super-2 number, since 2×81933556070² (a number of 23 digits) contains 22 as substring.

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, 4096677794 + ... + 4096677813.

It is an arithmetic number, because the mean of its divisors is an integer number (18435050118).

Almost surely, 2^81933556070 is an apocalyptic number.

81933556070 is a deficient number, since it is larger than the sum of its proper divisors (65546844874).

81933556070 is a wasteful number, since it uses less digits than its factorization.

81933556070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193355614.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 81933556070 in words is "eighty-one billion, nine hundred thirty-three million, five hundred fifty-six thousand, seventy".