6254639540 has 48 divisors (see below), whose sum is σ = 13371994944. Its totient is φ = 2457062400.

The previous prime is 6254639537. The next prime is 6254639563. The reversal of 6254639540 is 459364526.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6254639491 and 6254639500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241835 + ... + 266445.

It is an arithmetic number, because the mean of its divisors is an integer number (278583228).

Almost surely, 2^6254639540 is an apocalyptic number.

It is an amenable number.

6254639540 is an abundant number, since it is smaller than the sum of its proper divisors (7117355404).

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

6254639540 is a wasteful number, since it uses less digits than its factorization.

6254639540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24848 (or 24846 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The square root of 6254639540 is about 79086.2790880947. The cubic root of 6254639540 is about 1842.4714288911.

The spelling of 6254639540 in words is "six billion, two hundred fifty-four million, six hundred thirty-nine thousand, five hundred forty".