1616151861 has 48 divisors (see below), whose sum is σ = 2490808320. Its totient is φ = 1008110880.

The previous prime is 1616151839. The next prime is 1616151863. The reversal of 1616151861 is 1681516161.

It is a de Polignac number, because none of the positive numbers 2^k-1616151861 is a prime.

It is a super-2 number, since 2×1616151861² = 5223893675627526642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616151863) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1283050 + ... + 1284308.

It is an arithmetic number, because the mean of its divisors is an integer number (51891840).

Almost surely, 2^1616151861 is an apocalyptic number.

It is an amenable number.

1616151861 is a deficient number, since it is larger than the sum of its proper divisors (874656459).

1616151861 is a wasteful number, since it uses less digits than its factorization.

1616151861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1443 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 1616151861 is about 40201.3912818947. The cubic root of 1616151861 is about 1173.5296195717.

The spelling of 1616151861 in words is "one billion, six hundred sixteen million, one hundred fifty-one thousand, eight hundred sixty-one".