1016155553 has 4 divisors (see below), whose sum is σ = 1161320640. Its totient is φ = 870990468.

The previous prime is 1016155523. The next prime is 1016155559. The reversal of 1016155553 is 3555516101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3555516101 = 257 ⋅13834693.

It is a cyclic number.

It is not a de Polignac number, because 1016155553 - 2¹⁴ = 1016139169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1016155559) 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, 72582533 + ... + 72582546.

It is an arithmetic number, because the mean of its divisors is an integer number (290330160).

Almost surely, 2^1016155553 is an apocalyptic number.

It is an amenable number.

1016155553 is a deficient number, since it is larger than the sum of its proper divisors (145165087).

1016155553 is an equidigital number, since it uses as much as digits as its factorization.

1016155553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145165086.

The product of its (nonzero) digits is 11250, while the sum is 32.

The square root of 1016155553 is about 31877.1948734515. The cubic root of 1016155553 is about 1005.3564416383.

The spelling of 1016155553 in words is "one billion, sixteen million, one hundred fifty-five thousand, five hundred fifty-three".