1651121676 has 18 divisors (see below), whose sum is σ = 4173668772. Its totient is φ = 550373880.

The previous prime is 1651121663. The next prime is 1651121711. The reversal of 1651121676 is 6761211561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 45864491 = 1651121676 / (1 + 6 + 5 + 1 + 1 + 2 + 1 + 6 + 7 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 1651121676.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 22932210 + ... + 22932281.

Almost surely, 2^1651121676 is an apocalyptic number.

It is an amenable number.

1651121676 is an abundant number, since it is smaller than the sum of its proper divisors (2522547096).

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

1651121676 is a wasteful number, since it uses less digits than its factorization.

1651121676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45864501 (or 45864496 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 1651121676 is about 40633.9965546093. The cubic root of 1651121676 is about 1181.9334567055.

The spelling of 1651121676 in words is "one billion, six hundred fifty-one million, one hundred twenty-one thousand, six hundred seventy-six".