41391392640 has 128 divisors (see below), whose sum is σ = 142084000800. Its totient is φ = 10188644352.

The previous prime is 41391392621. The next prime is 41391392677. The reversal of 41391392640 is 4629319314.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 41391392592 and 41391392601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804195 + ... + 854114.

Almost surely, 2^41391392640 is an apocalyptic number.

41391392640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

41391392640 is an abundant number, since it is smaller than the sum of its proper divisors (100692608160).

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

41391392640 is a wasteful number, since it uses less digits than its factorization.

41391392640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658344 (or 1658332 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 41391392640 in words is "forty-one billion, three hundred ninety-one million, three hundred ninety-two thousand, six hundred forty".