40120342425 has 36 divisors (see below), whose sum is σ = 71871724444. Its totient is φ = 21394022400.

The previous prime is 40120342387. The next prime is 40120342441. The reversal of 40120342425 is 52424302104.

It can be written as a sum of positive squares in 6 ways, for example, as 7755972624 + 32364369801 = 88068^2 + 179901^2 .

It is not a de Polignac number, because 40120342425 - 2²⁰ = 40119293849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1961049 + ... + 1981401.

Almost surely, 2^40120342425 is an apocalyptic number.

40120342425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40120342425 is a deficient number, since it is larger than the sum of its proper divisors (31751382019).

40120342425 is a wasteful number, since it uses less digits than its factorization.

40120342425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29130 (or 29122 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 40120342425 its reverse (52424302104), we get a palindrome (92544644529).

The spelling of 40120342425 in words is "forty billion, one hundred twenty million, three hundred forty-two thousand, four hundred twenty-five".