249999499975 has 12 divisors (see below), whose sum is σ = 312896573784. Its totient is φ = 198130442720.

The previous prime is 249999499973. The next prime is 249999499987. The reversal of 249999499975 is 579994999942.

It is not a de Polignac number, because 249999499975 - 2¹ = 249999499973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249999499892 and 249999499901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249999499973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46726204 + ... + 46731553.

It is an arithmetic number, because the mean of its divisors is an integer number (26074714482).

Almost surely, 2^249999499975 is an apocalyptic number.

249999499975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

249999499975 is a deficient number, since it is larger than the sum of its proper divisors (62897073809).

249999499975 is a wasteful number, since it uses less digits than its factorization.

249999499975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93457874 (or 93457869 counting only the distinct ones).

The product of its digits is 5356925280, while the sum is 85.

The spelling of 249999499975 in words is "two hundred forty-nine billion, nine hundred ninety-nine million, four hundred ninety-nine thousand, nine hundred seventy-five".