7725401409 has 32 divisors (see below), whose sum is σ = 11936471040. Its totient is φ = 4392377600.

The previous prime is 7725401401. The next prime is 7725401419. The reversal of 7725401409 is 9041045277.

It is a cyclic number.

It is not a de Polignac number, because 7725401409 - 2³ = 7725401401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7725401401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152332 + ... + 196610.

It is an arithmetic number, because the mean of its divisors is an integer number (373014720).

Almost surely, 2^7725401409 is an apocalyptic number.

It is an amenable number.

7725401409 is a deficient number, since it is larger than the sum of its proper divisors (4211069631).

7725401409 is a wasteful number, since it uses less digits than its factorization.

7725401409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44621.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 7725401409 is about 87894.2626625879. The cubic root of 7725401409 is about 1976.8498533417.

The spelling of 7725401409 in words is "seven billion, seven hundred twenty-five million, four hundred one thousand, four hundred nine".