40425644019 has 4 divisors (see below), whose sum is σ = 53900858696. Its totient is φ = 26950429344.

The previous prime is 40425643931. The next prime is 40425644029. The reversal of 40425644019 is 91044652404.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40425644019 - 2⁸ = 40425643763 is a prime.

It is a super-2 number, since 2×40425644019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40425644029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6737607334 + ... + 6737607339.

It is an arithmetic number, because the mean of its divisors is an integer number (13475214674).

Almost surely, 2^40425644019 is an apocalyptic number.

40425644019 is a deficient number, since it is larger than the sum of its proper divisors (13475214677).

40425644019 is a wasteful number, since it uses less digits than its factorization.

40425644019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13475214676.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 40425644019 in words is "forty billion, four hundred twenty-five million, six hundred forty-four thousand, nineteen".