171511550480 has 40 divisors (see below), whose sum is σ = 398783119104. Its totient is φ = 68601392000.

The previous prime is 171511550479. The next prime is 171511550489. The reversal of 171511550480 is 84055115171.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (171511550489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2399255 + ... + 2469705.

Almost surely, 2^171511550480 is an apocalyptic number.

171511550480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171511550480 is an abundant number, since it is smaller than the sum of its proper divisors (227271568624).

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

171511550480 is a wasteful number, since it uses less digits than its factorization.

171511550480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100895 (or 100889 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 38.

The spelling of 171511550480 in words is "one hundred seventy-one billion, five hundred eleven million, five hundred fifty thousand, four hundred eighty".