2578406536 has 32 divisors (see below), whose sum is σ = 5064897600. Its totient is φ = 1228216000.

The previous prime is 2578406497. The next prime is 2578406539. The reversal of 2578406536 is 6356048752.

2578406536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (2578406539) 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, 18270 + ... + 74098.

It is an arithmetic number, because the mean of its divisors is an integer number (158278050).

Almost surely, 2^2578406536 is an apocalyptic number.

It is an amenable number.

2578406536 is a deficient number, since it is larger than the sum of its proper divisors (2486491064).

2578406536 is a wasteful number, since it uses less digits than its factorization.

2578406536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56109 (or 56105 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The square root of 2578406536 is about 50778.0123281721. The cubic root of 2578406536 is about 1371.2515488732.

The spelling of 2578406536 in words is "two billion, five hundred seventy-eight million, four hundred six thousand, five hundred thirty-six".