40387926645 has 64 divisors (see below), whose sum is σ = 80445185280. Its totient is φ = 19052755200.

The previous prime is 40387926617. The next prime is 40387926659. The reversal of 40387926645 is 54662978304.

It is not a de Polignac number, because 40387926645 - 2⁶ = 40387926581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40387926591 and 40387926600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 312586 + ... + 422475.

It is an arithmetic number, because the mean of its divisors is an integer number (1256956020).

Almost surely, 2^40387926645 is an apocalyptic number.

40387926645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40387926645 is a deficient number, since it is larger than the sum of its proper divisors (40057258635).

40387926645 is a wasteful number, since it uses less digits than its factorization.

40387926645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735123 (or 735117 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 40387926645 in words is "forty billion, three hundred eighty-seven million, nine hundred twenty-six thousand, six hundred forty-five".