1225219216465 has 16 divisors (see below), whose sum is σ = 1471192450560. Its totient is φ = 979556001280.

The previous prime is 1225219216453. The next prime is 1225219216483. The reversal of 1225219216465 is 5646129125221.

It is a de Polignac number, because none of the positive numbers 2^k-1225219216465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58620897 + ... + 58641793.

It is an arithmetic number, because the mean of its divisors is an integer number (91949528160).

Almost surely, 2^{1225219216465} is an apocalyptic number.

It is an amenable number.

1225219216465 is a deficient number, since it is larger than the sum of its proper divisors (245973234095).

1225219216465 is a wasteful number, since it uses less digits than its factorization.

1225219216465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27752.

The product of its digits is 518400, while the sum is 46.

The spelling of 1225219216465 in words is "one trillion, two hundred twenty-five billion, two hundred nineteen million, two hundred sixteen thousand, four hundred sixty-five".