1077721553 has 8 divisors (see below), whose sum is σ = 1153672800. Its totient is φ = 1003693248.

The previous prime is 1077721549. The next prime is 1077721571. The reversal of 1077721553 is 3551277701.

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

It is a cyclic number.

It is not a de Polignac number, because 1077721553 - 2² = 1077721549 is a prime.

It is a super-2 number, since 2×1077721553² = 2322967491601463618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1077721543) 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, 479576 + ... + 481817.

It is an arithmetic number, because the mean of its divisors is an integer number (144209100).

Almost surely, 2^1077721553 is an apocalyptic number.

It is an amenable number.

1077721553 is a deficient number, since it is larger than the sum of its proper divisors (75951247).

1077721553 is an equidigital number, since it uses as much as digits as its factorization.

1077721553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961471.

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 1077721553 is about 32828.6696806313. The cubic root of 1077721553 is about 1025.2635619677.

It can be divided in two parts, 10777 and 21553, that multiplied together give a triangular number (232276681 = T₂₁₅₅₃).

The spelling of 1077721553 in words is "one billion, seventy-seven million, seven hundred twenty-one thousand, five hundred fifty-three".