1225585450651 has 4 divisors (see below), whose sum is σ = 1297678712472. Its totient is φ = 1153492188832.

The previous prime is 1225585450603. The next prime is 1225585450703. The reversal of 1225585450651 is 1560545855221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1225585450651 - 2²⁹ = 1225048579739 is a prime.

It is a super-3 number, since 3×1225585450651³ (a number of 37 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225585450595 and 1225585450604.

It is not an unprimeable number, because it can be changed into a prime (1225585450951) 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, 36046630885 + ... + 36046630918.

It is an arithmetic number, because the mean of its divisors is an integer number (324419678118).

Almost surely, 2^{1225585450651} is an apocalyptic number.

1225585450651 is a deficient number, since it is larger than the sum of its proper divisors (72093261821).

1225585450651 is an equidigital number, since it uses as much as digits as its factorization.

1225585450651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72093261820.

The product of its (nonzero) digits is 2400000, while the sum is 49.

The spelling of 1225585450651 in words is "one trillion, two hundred twenty-five billion, five hundred eighty-five million, four hundred fifty thousand, six hundred fifty-one".