73142756649691 has 4 divisors (see below), whose sum is σ = 73142813079000. Its totient is φ = 73142700220384.

The previous prime is 73142756649671. The next prime is 73142756649761. The reversal of 73142756649691 is 19694665724137.

It is a happy number.

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 73142756649691 - 2¹⁷ = 73142756518619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73142756649691.

It is not an unprimeable number, because it can be changed into a prime (73142756649631) 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, 26223541 + ... + 28878358.

It is an arithmetic number, because the mean of its divisors is an integer number (18285703269750).

Almost surely, 2^{73142756649691} is an apocalyptic number.

73142756649691 is a deficient number, since it is larger than the sum of its proper divisors (56429309).

73142756649691 is a wasteful number, since it uses less digits than its factorization.

73142756649691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56429308.

The product of its digits is 411505920, while the sum is 70.

The spelling of 73142756649691 in words is "seventy-three trillion, one hundred forty-two billion, seven hundred fifty-six million, six hundred forty-nine thousand, six hundred ninety-one".