2505091642 has 8 divisors (see below), whose sum is σ = 3774191616. Its totient is φ = 1247027772.

The previous prime is 2505091571. The next prime is 2505091643. The reversal of 2505091642 is 2461905052.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 2505091598 and 2505091607.

It is not an unprimeable number, because it can be changed into a prime (2505091643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758458 + ... + 2759365.

It is an arithmetic number, because the mean of its divisors is an integer number (471773952).

Almost surely, 2^2505091642 is an apocalyptic number.

2505091642 is a deficient number, since it is larger than the sum of its proper divisors (1269099974).

2505091642 is a wasteful number, since it uses less digits than its factorization.

2505091642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5518052.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2505091642 is about 50050.8905215482. The cubic root of 2505091642 is about 1358.1295730023.

Adding to 2505091642 its reverse (2461905052), we get a palindrome (4966996694).

The spelling of 2505091642 in words is "two billion, five hundred five million, ninety-one thousand, six hundred forty-two".