1628411081 has 16 divisors (see below), whose sum is σ = 1809355968. Its totient is φ = 1453108800.

The previous prime is 1628411053. The next prime is 1628411153. The reversal of 1628411081 is 1801148261.

It is a happy number.

It is not a de Polignac number, because 1628411081 - 2²² = 1624216777 is a prime.

It is a super-3 number, since 3×1628411081³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1628411041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212171 + ... + 219711.

It is an arithmetic number, because the mean of its divisors is an integer number (113084748).

Almost surely, 2^1628411081 is an apocalyptic number.

1628411081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1628411081 is a deficient number, since it is larger than the sum of its proper divisors (180944887).

1628411081 is a wasteful number, since it uses less digits than its factorization.

1628411081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7912.

The product of its (nonzero) digits is 3072, while the sum is 32.

The square root of 1628411081 is about 40353.5758142943. The cubic root of 1628411081 is about 1176.4893938638.

The spelling of 1628411081 in words is "one billion, six hundred twenty-eight million, four hundred eleven thousand, eighty-one".