40425644020 has 24 divisors (see below), whose sum is σ = 89887609224. Its totient is φ = 15219065856.

The previous prime is 40425643931. The next prime is 40425644029. The reversal of 40425644020 is 2044652404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20466735844 + 19958908176 = 143062^2 + 141276^2 .

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 59449137 + ... + 59449816.

It is an arithmetic number, because the mean of its divisors is an integer number (3745317051).

Almost surely, 2^40425644020 is an apocalyptic number.

It is an amenable number.

40425644020 is an abundant number, since it is smaller than the sum of its proper divisors (49461965204).

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

40425644020 is a wasteful number, since it uses less digits than its factorization.

40425644020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118898979 (or 118898977 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

The spelling of 40425644020 in words is "forty billion, four hundred twenty-five million, six hundred forty-four thousand, twenty".