81037670011 has 16 divisors (see below), whose sum is σ = 86889876480. Its totient is φ = 75394630080.

The previous prime is 81037669991. The next prime is 81037670023. The reversal of 81037670011 is 11007673018.

It is a cyclic number.

It is not a de Polignac number, because 81037670011 - 2⁷ = 81037669883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81037670041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64951 + ... + 407791.

It is an arithmetic number, because the mean of its divisors is an integer number (5430617280).

Almost surely, 2^81037670011 is an apocalyptic number.

81037670011 is a deficient number, since it is larger than the sum of its proper divisors (5852206469).

81037670011 is a wasteful number, since it uses less digits than its factorization.

81037670011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343146.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 81037670011 in words is "eighty-one billion, thirty-seven million, six hundred seventy thousand, eleven".