6911257440 has 48 divisors (see below), whose sum is σ = 21770462448. Its totient is φ = 1843001856.

The previous prime is 6911257427. The next prime is 6911257447. The reversal of 6911257440 is 447521196.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6911257447) 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, 7198747 + ... + 7199706.

It is an arithmetic number, because the mean of its divisors is an integer number (453551301).

Almost surely, 2^6911257440 is an apocalyptic number.

6911257440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6911257440 is an abundant number, since it is smaller than the sum of its proper divisors (14859205008).

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

6911257440 is a wasteful number, since it uses less digits than its factorization.

6911257440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14398471 (or 14398463 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 6911257440 is about 83133.9728390265. The cubic root of 6911257440 is about 1904.8130457682.

The spelling of 6911257440 in words is "six billion, nine hundred eleven million, two hundred fifty-seven thousand, four hundred forty".