1225745693956 has 81 divisors (see below), whose sum is σ = 2579368189671. Its totient is φ = 508174506000.

The previous prime is 1225745693929. The next prime is 1225745693971. The reversal of 1225745693956 is 6593965475221.

It is a happy number.

The square root of 1225745693956 is 1107134.

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

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 480494881 + ... + 480497431.

Almost surely, 2^{1225745693956} is an apocalyptic number.

1225745693956 is the 1107134-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1225745693956

1225745693956 is an abundant number, since it is smaller than the sum of its proper divisors (1353622495715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225745693956 is an frugal number, since it uses more digits than its factorization.

1225745693956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5182 (or 2591 counting only the distinct ones).

The product of its digits is 122472000, while the sum is 64.

Multiplying 1225745693956 by its sum of digits (64), we get a square (78447724413184 = 8857072²).

The spelling of 1225745693956 in words is "one trillion, two hundred twenty-five billion, seven hundred forty-five million, six hundred ninety-three thousand, nine hundred fifty-six".