1721161552 has 40 divisors (see below), whose sum is σ = 3689174592. Its totient is φ = 771321600.

The previous prime is 1721161537. The next prime is 1721161579. The reversal of 1721161552 is 2551611271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56373 + ... + 81364.

Almost surely, 2^1721161552 is an apocalyptic number.

It is an amenable number.

1721161552 is an abundant number, since it is smaller than the sum of its proper divisors (1968013040).

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

1721161552 is a wasteful number, since it uses less digits than its factorization.

1721161552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137827 (or 137821 counting only the distinct ones).

The product of its digits is 4200, while the sum is 31.

The square root of 1721161552 is about 41486.8840960610. The cubic root of 1721161552 is about 1198.4149331503.

The spelling of 1721161552 in words is "one billion, seven hundred twenty-one million, one hundred sixty-one thousand, five hundred fifty-two".