2540540478 has 32 divisors (see below), whose sum is σ = 5916519936. Its totient is φ = 712172448.

The previous prime is 2540540477. The next prime is 2540540479. The reversal of 2540540478 is 8740450452.

It is an interprime number because it is at equal distance from previous prime (2540540477) and next prime (2540540479).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540540473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568426 + ... + 572877.

It is an arithmetic number, because the mean of its divisors is an integer number (184891248).

Almost surely, 2^2540540478 is an apocalyptic number.

2540540478 is an abundant number, since it is smaller than the sum of its proper divisors (3375979458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2540540478 is a wasteful number, since it uses less digits than its factorization.

2540540478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141368.

The product of its (nonzero) digits is 179200, while the sum is 39.

The square root of 2540540478 is about 50403.7744419999. The cubic root of 2540540478 is about 1364.5057588889.

The spelling of 2540540478 in words is "two billion, five hundred forty million, five hundred forty thousand, four hundred seventy-eight".