81011762407 has 4 divisors (see below), whose sum is σ = 82540286280. Its totient is φ = 79483238536.

The previous prime is 81011762383. The next prime is 81011762417. The reversal of 81011762407 is 70426711018.

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

It is a cyclic number.

It is not a de Polignac number, because 81011762407 - 2¹⁵ = 81011729639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81011762417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 764261857 + ... + 764261962.

It is an arithmetic number, because the mean of its divisors is an integer number (20635071570).

Almost surely, 2^81011762407 is an apocalyptic number.

81011762407 is a deficient number, since it is larger than the sum of its proper divisors (1528523873).

81011762407 is a wasteful number, since it uses less digits than its factorization.

81011762407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528523872.

The product of its (nonzero) digits is 18816, while the sum is 37.

The spelling of 81011762407 in words is "eighty-one billion, eleven million, seven hundred sixty-two thousand, four hundred seven".