154887491397816 has 192 divisors, whose sum is σ = 449983646330400. Its totient is φ = 47979693425664.

The previous prime is 154887491397811. The next prime is 154887491397841. The reversal of 154887491397816 is 618793194788451.

154887491397816 is a `hidden beast` number, since 1 + 5 + 4 + 8 + 87 + 491 + 39 + 7 + 8 + 16 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154887491397811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379499490 + ... + 379907406.

Almost surely, 2^{154887491397816} 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 154887491397816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224991823165200).

154887491397816 is an abundant number, since it is smaller than the sum of its proper divisors (295096154932584).

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

154887491397816 is a wasteful number, since it uses less digits than its factorization.

154887491397816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413238 (or 413231 counting only the distinct ones).

The product of its digits is 2926264320, while the sum is 81.

The spelling of 154887491397816 in words is "one hundred fifty-four trillion, eight hundred eighty-seven billion, four hundred ninety-one million, three hundred ninety-seven thousand, eight hundred sixteen".