40539657648 has 720 divisors, whose sum is σ = 141302325120. Its totient is φ = 9949298688.

The previous prime is 40539657623. The next prime is 40539657659. The reversal of 40539657648 is 84675693504.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 555337740 + ... + 555337812.

Almost surely, 2^40539657648 is an apocalyptic number.

40539657648 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40539657648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70651162560).

40539657648 is an abundant number, since it is smaller than the sum of its proper divisors (100762667472).

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

40539657648 is a wasteful number, since it uses less digits than its factorization.

40539657648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 57.

The spelling of 40539657648 in words is "forty billion, five hundred thirty-nine million, six hundred fifty-seven thousand, six hundred forty-eight".