43428621901 has 8 divisors (see below), whose sum is σ = 50331763584. Its totient is φ = 36700243440.

The previous prime is 43428621871. The next prime is 43428621913. The reversal of 43428621901 is 10912682434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43428621901 - 2¹⁵ = 43428589133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43428621941) 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, 43690270 + ... + 43691263.

It is an arithmetic number, because the mean of its divisors is an integer number (6291470448).

Almost surely, 2^43428621901 is an apocalyptic number.

It is an amenable number.

43428621901 is a deficient number, since it is larger than the sum of its proper divisors (6903141683).

43428621901 is an equidigital number, since it uses as much as digits as its factorization.

43428621901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87381611.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 43428621901 in words is "forty-three billion, four hundred twenty-eight million, six hundred twenty-one thousand, nine hundred one".