2478602591 has 4 divisors (see below), whose sum is σ = 2478875592. Its totient is φ = 2478329592.

The previous prime is 2478602587. The next prime is 2478602627. The reversal of 2478602591 is 1952068742.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2478602591 - 2² = 2478602587 is a prime.

It is a super-2 number, since 2×2478602591² = 12286941608223826562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478601591) 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, 122396 + ... + 141201.

It is an arithmetic number, because the mean of its divisors is an integer number (619718898).

Almost surely, 2^2478602591 is an apocalyptic number.

2478602591 is a deficient number, since it is larger than the sum of its proper divisors (273001).

2478602591 is an equidigital number, since it uses as much as digits as its factorization.

2478602591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273000.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 2478602591 is about 49785.5660909867. The cubic root of 2478602591 is about 1353.3256081496.

The spelling of 2478602591 in words is "two billion, four hundred seventy-eight million, six hundred two thousand, five hundred ninety-one".