1145774425621 has 24 divisors (see below), whose sum is σ = 1350275875904. Its totient is φ = 952219955520.

The previous prime is 1145774425573. The next prime is 1145774425669. The reversal of 1145774425621 is 1265244775411.

It is an interprime number because it is at equal distance from previous prime (1145774425573) and next prime (1145774425669).

It is not a de Polignac number, because 1145774425621 - 2¹⁷ = 1145774294549 is a prime.

It is a super-2 number, since 2×1145774425621² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1145774425121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1456726 + ... + 2100856.

Almost surely, 2^{1145774425621} is an apocalyptic number.

It is an amenable number.

1145774425621 is a deficient number, since it is larger than the sum of its proper divisors (204501450283).

1145774425621 is an frugal number, since it uses more digits than its factorization.

1145774425621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644329 (or 644270 counting only the distinct ones).

The product of its digits is 1881600, while the sum is 49.

The spelling of 1145774425621 in words is "one trillion, one hundred forty-five billion, seven hundred seventy-four million, four hundred twenty-five thousand, six hundred twenty-one".