1055649161 has 4 divisors (see below), whose sum is σ = 1206456192. Its totient is φ = 904842132.

The previous prime is 1055649151. The next prime is 1055649211. The reversal of 1055649161 is 1619465501.

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 1055649161 - 2¹⁸ = 1055387017 is a prime.

It is a super-2 number, since 2×1055649161² = 2228790302240007842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055649121) 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, 75403505 + ... + 75403518.

It is an arithmetic number, because the mean of its divisors is an integer number (301614048).

Almost surely, 2^1055649161 is an apocalyptic number.

It is an amenable number.

1055649161 is a deficient number, since it is larger than the sum of its proper divisors (150807031).

1055649161 is an equidigital number, since it uses as much as digits as its factorization.

1055649161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150807030.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1055649161 is about 32490.7550081558. The cubic root of 1055649161 is about 1018.2158870043.

The spelling of 1055649161 in words is "one billion, fifty-five million, six hundred forty-nine thousand, one hundred sixty-one".