40055720673 has 4 divisors (see below), whose sum is σ = 53407627568. Its totient is φ = 26703813780.

The previous prime is 40055720657. The next prime is 40055720687. The reversal of 40055720673 is 37602755004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40055720673 - 2⁴ = 40055720657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40055720473) 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, 6675953443 + ... + 6675953448.

It is an arithmetic number, because the mean of its divisors is an integer number (13351906892).

Almost surely, 2^40055720673 is an apocalyptic number.

It is an amenable number.

40055720673 is a deficient number, since it is larger than the sum of its proper divisors (13351906895).

40055720673 is a wasteful number, since it uses less digits than its factorization.

40055720673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13351906894.

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 40055720673 in words is "forty billion, fifty-five million, seven hundred twenty thousand, six hundred seventy-three".