1453220256642 has 48 divisors (see below), whose sum is σ = 3688321550112. Its totient is φ = 377459806080.

The previous prime is 1453220256563. The next prime is 1453220256647. The reversal of 1453220256642 is 2466520223541.

It is a super-2 number, since 2×1453220256642² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1453220256594 and 1453220256603.

It is not an unprimeable number, because it can be changed into a prime (1453220256647) 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, 224675223 + ... + 224681690.

It is an arithmetic number, because the mean of its divisors is an integer number (76840032294).

Almost surely, 2^{1453220256642} is an apocalyptic number.

1453220256642 is an abundant number, since it is smaller than the sum of its proper divisors (2235101293470).

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

1453220256642 is a wasteful number, since it uses less digits than its factorization.

1453220256642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449356943 (or 449356936 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 1453220256642 in words is "one trillion, four hundred fifty-three billion, two hundred twenty million, two hundred fifty-six thousand, six hundred forty-two".