81250501695 has 16 divisors (see below), whose sum is σ = 141819057792. Its totient is φ = 39394182560.

The previous prime is 81250501691. The next prime is 81250501699. The reversal of 81250501695 is 59610505218.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (81250501691) and next prime (81250501699).

It is not a de Polignac number, because 81250501695 - 2² = 81250501691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81250501691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246213477 + ... + 246213806.

It is an arithmetic number, because the mean of its divisors is an integer number (8863691112).

Almost surely, 2^81250501695 is an apocalyptic number.

81250501695 is a deficient number, since it is larger than the sum of its proper divisors (60568556097).

81250501695 is a wasteful number, since it uses less digits than its factorization.

81250501695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492427302.

The product of its (nonzero) digits is 108000, while the sum is 42.

The spelling of 81250501695 in words is "eighty-one billion, two hundred fifty million, five hundred one thousand, six hundred ninety-five".