1055651509 has 8 divisors (see below), whose sum is σ = 1173349152. Its totient is φ = 941575440.

The previous prime is 1055651491. The next prime is 1055651561. The reversal of 1055651509 is 9051565501.

It is a happy number.

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 1055651509 - 2⁹ = 1055650997 is a prime.

It is a super-2 number, since 2×1055651509² = 2228800216907954162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055651209) 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, 904779 + ... + 905944.

It is an arithmetic number, because the mean of its divisors is an integer number (146668644).

Almost surely, 2^1055651509 is an apocalyptic number.

It is an amenable number.

1055651509 is a deficient number, since it is larger than the sum of its proper divisors (117697643).

1055651509 is a wasteful number, since it uses less digits than its factorization.

1055651509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810787.

The product of its (nonzero) digits is 33750, while the sum is 37.

The square root of 1055651509 is about 32490.7911414912. The cubic root of 1055651509 is about 1018.2166419171.

The spelling of 1055651509 in words is "one billion, fifty-five million, six hundred fifty-one thousand, five hundred nine".