1219621840454 has 8 divisors (see below), whose sum is σ = 1832397807528. Its totient is φ = 608822571280.

The previous prime is 1219621840453. The next prime is 1219621840499. The reversal of 1219621840454 is 4540481269121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1219621840454² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1219621840399 and 1219621840408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1219621840453) 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, 494172932 + ... + 494175399.

It is an arithmetic number, because the mean of its divisors is an integer number (229049725941).

Almost surely, 2^{1219621840454} is an apocalyptic number.

1219621840454 is a deficient number, since it is larger than the sum of its proper divisors (612775967074).

1219621840454 is an equidigital number, since it uses as much as digits as its factorization.

1219621840454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988348950.

The product of its (nonzero) digits is 552960, while the sum is 47.

The spelling of 1219621840454 in words is "one trillion, two hundred nineteen billion, six hundred twenty-one million, eight hundred forty thousand, four hundred fifty-four".