2505749471 has 8 divisors (see below), whose sum is σ = 2518620720. Its totient is φ = 2492911872.

The previous prime is 2505749453. The next prime is 2505749489. The reversal of 2505749471 is 1749475052.

It is an interprime number because it is at equal distance from previous prime (2505749453) and next prime (2505749489).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2505749471 is a prime.

It is a super-3 number, since 3×2505749471³ (a number of 29 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505749671) 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, 148271 + ... + 164303.

It is an arithmetic number, because the mean of its divisors is an integer number (314827590).

Almost surely, 2^2505749471 is an apocalyptic number.

2505749471 is a deficient number, since it is larger than the sum of its proper divisors (12871249).

2505749471 is a wasteful number, since it uses less digits than its factorization.

2505749471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16825.

The product of its (nonzero) digits is 352800, while the sum is 44.

The square root of 2505749471 is about 50057.4616915401. The cubic root of 2505749471 is about 1358.2484427491.

The spelling of 2505749471 in words is "two billion, five hundred five million, seven hundred forty-nine thousand, four hundred seventy-one".