154820474450856 has 128 divisors (see below), whose sum is σ = 431640936720000. Its totient is φ = 51416764471296.

The previous prime is 154820474450809. The next prime is 154820474450867. The reversal of 154820474450856 is 658054474028451.

154820474450856 is a `hidden beast` number, since 1 + 5 + 4 + 8 + 2 + 0 + 4 + 74 + 4 + 508 + 56 = 666.

154820474450856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 154820474450793 and 154820474450802.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 889435320 + ... + 889609368.

It is an arithmetic number, because the mean of its divisors is an integer number (3372194818125).

Almost surely, 2^{154820474450856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154820474450856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215820468360000).

154820474450856 is an abundant number, since it is smaller than the sum of its proper divisors (276820462269144).

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

154820474450856 is a wasteful number, since it uses less digits than its factorization.

154820474450856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189208 (or 189198 counting only the distinct ones).

The product of its (nonzero) digits is 172032000, while the sum is 63.

The spelling of 154820474450856 in words is "one hundred fifty-four trillion, eight hundred twenty billion, four hundred seventy-four million, four hundred fifty thousand, eight hundred fifty-six".