155451116805480 has 192 divisors, whose sum is σ = 522914115906000. Its totient is φ = 40003002482688.

The previous prime is 155451116805461. The next prime is 155451116805493. The reversal of 155451116805480 is 84508611154551.

155451116805480 is a `hidden beast` number, since 1 + 5 + 5 + 4 + 5 + 1 + 1 + 16 + 80 + 548 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 21113234667396 + 134337882138084 = 4594914^2 + 11590422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15779934 + ... + 23662386.

Almost surely, 2^{155451116805480} is an apocalyptic number.

155451116805480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155451116805480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261457057953000).

155451116805480 is an abundant number, since it is smaller than the sum of its proper divisors (367462999100520).

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

155451116805480 is a wasteful number, since it uses less digits than its factorization.

155451116805480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7884388 (or 7884381 counting only the distinct ones).

The product of its (nonzero) digits is 3840000, while the sum is 54.

The spelling of 155451116805480 in words is "one hundred fifty-five trillion, four hundred fifty-one billion, one hundred sixteen million, eight hundred five thousand, four hundred eighty".