1601156887 has 16 divisors (see below), whose sum is σ = 1796256000. Its totient is φ = 1414590400.

The previous prime is 1601156867. The next prime is 1601156897. The reversal of 1601156887 is 7886511061.

It is a cyclic number.

It is not a de Polignac number, because 1601156887 - 2²³ = 1592768279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601156857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111864 + ... + 125362.

It is an arithmetic number, because the mean of its divisors is an integer number (112266000).

Almost surely, 2^1601156887 is an apocalyptic number.

1601156887 is a deficient number, since it is larger than the sum of its proper divisors (195099113).

1601156887 is a wasteful number, since it uses less digits than its factorization.

1601156887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 1601156887 is about 40014.4584744065. The cubic root of 1601156887 is about 1169.8889238793. Note that the first 3 decimals are identical.

The spelling of 1601156887 in words is "one billion, six hundred one million, one hundred fifty-six thousand, eight hundred eighty-seven".