1001655616 has 28 divisors (see below), whose sum is σ = 2140559092. Its totient is φ = 462302208.

The previous prime is 1001655559. The next prime is 1001655619. The reversal of 1001655616 is 6165561001.

It can be written as a sum of positive squares in 2 ways, for example, as 600054016 + 401601600 = 24496^2 + 20040^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001655619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601125 + ... + 602788.

It is an arithmetic number, because the mean of its divisors is an integer number (76448539).

Almost surely, 2^1001655616 is an apocalyptic number.

1001655616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1001655616 is an abundant number, since it is smaller than the sum of its proper divisors (1138903476).

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

1001655616 is a wasteful number, since it uses less digits than its factorization.

1001655616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1203938 (or 1203928 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1001655616 is about 31648.9433630888. The cubic root of 1001655616 is about 1000.5515677171.

The spelling of 1001655616 in words is "one billion, one million, six hundred fifty-five thousand, six hundred sixteen".