1819198154904 has 64 divisors (see below), whose sum is σ = 4966824925440. Its totient is φ = 551869422720.

The previous prime is 1819198154903. The next prime is 1819198154933. The reversal of 1819198154904 is 4094518919181.

It is a super-2 number, since 2×1819198154904² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819198154903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41039562 + ... + 41083865.

It is an arithmetic number, because the mean of its divisors is an integer number (77606639460).

Almost surely, 2^{1819198154904} is an apocalyptic number.

It is an amenable number.

1819198154904 is an abundant number, since it is smaller than the sum of its proper divisors (3147626770536).

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

1819198154904 is a wasteful number, since it uses less digits than its factorization.

1819198154904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82123520 (or 82123516 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 60.

The spelling of 1819198154904 in words is "one trillion, eight hundred nineteen billion, one hundred ninety-eight million, one hundred fifty-four thousand, nine hundred four".