1611670725 has 72 divisors (see below), whose sum is σ = 3472763840. Its totient is φ = 697973760.

The previous prime is 1611670721. The next prime is 1611670733. The reversal of 1611670725 is 5270761161.

It is not a de Polignac number, because 1611670725 - 2² = 1611670721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1611670725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611670721) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2997 + ... + 56853.

Almost surely, 2^1611670725 is an apocalyptic number.

1611670725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1611670725 is an abundant number, since it is smaller than the sum of its proper divisors (1861093115).

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

1611670725 is a wasteful number, since it uses less digits than its factorization.

1611670725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53899 (or 53891 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 1611670725 is about 40145.6190013306. The cubic root of 1611670725 is about 1172.4439926997.

The spelling of 1611670725 in words is "one billion, six hundred eleven million, six hundred seventy thousand, seven hundred twenty-five".