1621547060 has 72 divisors (see below), whose sum is σ = 3935441664. Its totient is φ = 549780480.

The previous prime is 1621547041. The next prime is 1621547069. The reversal of 1621547060 is 607451261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621547069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1316645 + ... + 1317875.

It is an arithmetic number, because the mean of its divisors is an integer number (54658912).

Almost surely, 2^1621547060 is an apocalyptic number.

1621547060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621547060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1967720832).

1621547060 is an abundant number, since it is smaller than the sum of its proper divisors (2313894604).

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

1621547060 is a wasteful number, since it uses less digits than its factorization.

1621547060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 1621547060 is about 40268.4375162484. The cubic root of 1621547060 is about 1174.8340335981.

The spelling of 1621547060 in words is "one billion, six hundred twenty-one million, five hundred forty-seven thousand, sixty".