72777755145 has 16 divisors (see below), whose sum is σ = 117087751872. Its totient is φ = 38600354880.

The previous prime is 72777755131. The next prime is 72777755189. The reversal of 72777755145 is 54155777727.

It is not a de Polignac number, because 72777755145 - 2⁹ = 72777754633 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13400187 + ... + 13405616.

It is an arithmetic number, because the mean of its divisors is an integer number (7317984492).

Almost surely, 2^72777755145 is an apocalyptic number.

It is an amenable number.

72777755145 is a deficient number, since it is larger than the sum of its proper divisors (44309996727).

72777755145 is a wasteful number, since it uses less digits than its factorization.

72777755145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26805992.

The product of its digits is 16807000, while the sum is 57.

The spelling of 72777755145 in words is "seventy-two billion, seven hundred seventy-seven million, seven hundred fifty-five thousand, one hundred forty-five".