40958981021 has 4 divisors (see below), whose sum is σ = 46810264032. Its totient is φ = 35107698012.

The previous prime is 40958981009. The next prime is 40958981033. The reversal of 40958981021 is 12018985904.

40958981021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (40958981009) and next prime (40958981033).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40958981021 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40958981071) 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, 2925641495 + ... + 2925641508.

It is an arithmetic number, because the mean of its divisors is an integer number (11702566008).

Almost surely, 2^40958981021 is an apocalyptic number.

It is an amenable number.

40958981021 is a deficient number, since it is larger than the sum of its proper divisors (5851283011).

40958981021 is an equidigital number, since it uses as much as digits as its factorization.

40958981021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851283010.

The product of its (nonzero) digits is 207360, while the sum is 47.

The spelling of 40958981021 in words is "forty billion, nine hundred fifty-eight million, nine hundred eighty-one thousand, twenty-one".