123456777445 has 8 divisors (see below), whose sum is σ = 149213947680. Its totient is φ = 98054878800.

The previous prime is 123456777407. The next prime is 123456777449. The reversal of 123456777445 is 544777654321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-123456777445 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123456777449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88817131 + ... + 88818520.

It is an arithmetic number, because the mean of its divisors is an integer number (18651743460).

Almost surely, 2^123456777445 is an apocalyptic number.

It is an amenable number.

123456777445 is a deficient number, since it is larger than the sum of its proper divisors (25757170235).

123456777445 is a wasteful number, since it uses less digits than its factorization.

123456777445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177635795.

The product of its digits is 19756800, while the sum is 55.

The spelling of 123456777445 in words is "one hundred twenty-three billion, four hundred fifty-six million, seven hundred seventy-seven thousand, four hundred forty-five".