1616155401 has 16 divisors (see below), whose sum is σ = 2463933824. Its totient is φ = 923059584.

The previous prime is 1616155393. The next prime is 1616155433. The reversal of 1616155401 is 1045516161.

It is not a de Polignac number, because 1616155401 - 2³ = 1616155393 is a prime.

It is a super-2 number, since 2×1616155401² = 5223916560362941602, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1616155451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26871 + ... + 62883.

It is an arithmetic number, because the mean of its divisors is an integer number (153995864).

Almost surely, 2^1616155401 is an apocalyptic number.

It is an amenable number.

1616155401 is a deficient number, since it is larger than the sum of its proper divisors (847778423).

1616155401 is a wasteful number, since it uses less digits than its factorization.

1616155401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38160.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 1616155401 is about 40201.4353101976. The cubic root of 1616155401 is about 1173.5304763995.

The spelling of 1616155401 in words is "one billion, six hundred sixteen million, one hundred fifty-five thousand, four hundred one".