1615655616 has 112 divisors (see below), whose sum is σ = 4408724736. Its totient is φ = 521800704.

The previous prime is 1615655593. The next prime is 1615655647. The reversal of 1615655616 is 6165565161.

It is a super-2 number, since 2×1615655616² = 5220686139024678912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3317325 + ... + 3317811.

Almost surely, 2^1615655616 is an apocalyptic number.

1615655616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1615655616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204362368).

1615655616 is an abundant number, since it is smaller than the sum of its proper divisors (2793069120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1615655616 is a wasteful number, since it uses less digits than its factorization.

1615655616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 996 counting only the distinct ones).

The product of its digits is 162000, while the sum is 42.

The square root of 1615655616 is about 40195.2188201532. The cubic root of 1615655616 is about 1173.4094951710.

It can be divided in two parts, 1615 and 655616, that added together give a triangular number (657231 = T₁₁₄₆).

The spelling of 1615655616 in words is "one billion, six hundred fifteen million, six hundred fifty-five thousand, six hundred sixteen".