1628612061 has 4 divisors (see below), whose sum is σ = 2171482752. Its totient is φ = 1085741372.

The previous prime is 1628612021. The next prime is 1628612077. The reversal of 1628612061 is 1602168261.

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 a cyclic number.

It is not a de Polignac number, because 1628612061 - 2⁶ = 1628611997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628612021) 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, 271435341 + ... + 271435346.

It is an arithmetic number, because the mean of its divisors is an integer number (542870688).

Almost surely, 2^1628612061 is an apocalyptic number.

It is an amenable number.

1628612061 is a deficient number, since it is larger than the sum of its proper divisors (542870691).

1628612061 is an equidigital number, since it uses as much as digits as its factorization.

1628612061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542870690.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1628612061 is about 40356.0659752657. The cubic root of 1628612061 is about 1176.5377930086.

The spelling of 1628612061 in words is "one billion, six hundred twenty-eight million, six hundred twelve thousand, sixty-one".