6449425740 has 120 divisors (see below), whose sum is σ = 21297035760. Its totient is φ = 1629320832.

The previous prime is 6449425663. The next prime is 6449425777. The reversal of 6449425740 is 475249446.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 73987 + ... + 135546.

It is an arithmetic number, because the mean of its divisors is an integer number (177475298).

Almost surely, 2^6449425740 is an apocalyptic number.

6449425740 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6449425740 is an abundant number, since it is smaller than the sum of its proper divisors (14847610020).

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

6449425740 is a wasteful number, since it uses less digits than its factorization.

6449425740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209573 (or 209562 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 6449425740 is about 80308.3167548667. The cubic root of 6449425740 is about 1861.4027399688.

The spelling of 6449425740 in words is "six billion, four hundred forty-nine million, four hundred twenty-five thousand, seven hundred forty".