245505405501 has 6 divisors (see below), whose sum is σ = 354618919070. Its totient is φ = 163670270328.

The previous prime is 245505405491. The next prime is 245505405503. The reversal of 245505405501 is 105504505542.

245505405501 is a `hidden beast` number, since 2 + 4 + 5 + 50 + 54 + 0 + 550 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 242752304601 + 2753100900 = 492699^2 + 52470^2 .

It is not a de Polignac number, because 245505405501 - 2⁶ = 245505405437 is a prime.

It is a super-3 number, since 3×245505405501³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245505405503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13639189186 + ... + 13639189203.

Almost surely, 2^245505405501 is an apocalyptic number.

It is an amenable number.

245505405501 is a deficient number, since it is larger than the sum of its proper divisors (109113513569).

245505405501 is a wasteful number, since it uses less digits than its factorization.

245505405501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27278378395 (or 27278378392 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 245505405501 in words is "two hundred forty-five billion, five hundred five million, four hundred five thousand, five hundred one".