1611490785 has 16 divisors (see below), whose sum is σ = 2648072256. Its totient is φ = 836232768.

The previous prime is 1611490781. The next prime is 1611490789. The reversal of 1611490785 is 5870941161.

It is an interprime number because it is at equal distance from previous prime (1611490781) and next prime (1611490789).

It is not a de Polignac number, because 1611490785 - 2² = 1611490781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1611490781) 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 15 ways as a sum of consecutive naturals, for example, 1451239 + ... + 1452348.

It is an arithmetic number, because the mean of its divisors is an integer number (165504516).

Almost surely, 2^1611490785 is an apocalyptic number.

1611490785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1611490785 is a deficient number, since it is larger than the sum of its proper divisors (1036581471).

1611490785 is a wasteful number, since it uses less digits than its factorization.

1611490785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903632.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1611490785 is about 40143.3778474109. The cubic root of 1611490785 is about 1172.4003573547.

The spelling of 1611490785 in words is "one billion, six hundred eleven million, four hundred ninety thousand, seven hundred eighty-five".