1145644721077 has 4 divisors (see below), whose sum is σ = 1205941811680. Its totient is φ = 1085347630476.

The previous prime is 1145644721057. The next prime is 1145644721129. The reversal of 1145644721077 is 7701274465411.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 1145644721077 - 2²³ = 1145636332469 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 1145644721077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145644721057) 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, 30148545273 + ... + 30148545310.

It is an arithmetic number, because the mean of its divisors is an integer number (301485452920).

Almost surely, 2^{1145644721077} is an apocalyptic number.

It is an amenable number.

1145644721077 is a deficient number, since it is larger than the sum of its proper divisors (60297090603).

1145644721077 is an equidigital number, since it uses as much as digits as its factorization.

1145644721077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60297090602.

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 1145644721077 in words is "one trillion, one hundred forty-five billion, six hundred forty-four million, seven hundred twenty-one thousand, seventy-seven".