1397774175625 has 75 divisors (see below), whose sum is σ = 1857875893313. Its totient is φ = 1051278930000.

The previous prime is 1397774175601. The next prime is 1397774175649. The reversal of 1397774175625 is 5265714777931.

The square root of 1397774175625 is 1182275.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1397774175601) and next prime (1397774175649).

It can be written as a sum of positive squares in 2 ways, for example, as 109585495369 + 1288188680256 = 331037^2 + 1134984^2 .

It is not a de Polignac number, because 1397774175625 - 2¹⁵ = 1397774142857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 10670031810 + ... + 10670031940.

Almost surely, 2^{1397774175625} is an apocalyptic number.

1397774175625 is the 1182275-th square number.

1397774175625 is the 591138-th centered octagonal number.

It is an amenable number.

1397774175625 is a deficient number, since it is larger than the sum of its proper divisors (460101717688).

1397774175625 is an frugal number, since it uses more digits than its factorization.

1397774175625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 155 counting only the distinct ones).

The product of its digits is 77792400, while the sum is 64.

Multiplying 1397774175625 by its sum of digits (64), we get a square (89457547240000 = 9458200²).

The spelling of 1397774175625 in words is "one trillion, three hundred ninety-seven billion, seven hundred seventy-four million, one hundred seventy-five thousand, six hundred twenty-five".