1606156551 has 12 divisors (see below), whose sum is σ = 2321521800. Its totient is φ = 1070070480.

The previous prime is 1606156543. The next prime is 1606156553. The reversal of 1606156551 is 1556516061.

It is not a de Polignac number, because 1606156551 - 2³ = 1606156543 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606156553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43665 + ... + 71546.

It is an arithmetic number, because the mean of its divisors is an integer number (193460150).

Almost surely, 2^1606156551 is an apocalyptic number.

1606156551 is a deficient number, since it is larger than the sum of its proper divisors (715365249).

1606156551 is a wasteful number, since it uses less digits than its factorization.

1606156551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116766 (or 116763 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1606156551 is about 40076.8830000538. The cubic root of 1606156551 is about 1171.1053306272.

The spelling of 1606156551 in words is "one billion, six hundred six million, one hundred fifty-six thousand, five hundred fifty-one".