2099621556077 has 8 divisors (see below), whose sum is σ = 2172044368440. Its totient is φ = 2027200215040.

The previous prime is 2099621556037. The next prime is 2099621556079. The reversal of 2099621556077 is 7706551269902.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 307929547396 + 1791692008681 = 554914^2 + 1338541^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2099621556077 - 2¹² = 2099621551981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099621556079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3084893 + ... + 3703485.

It is an arithmetic number, because the mean of its divisors is an integer number (271505546055).

Almost surely, 2^{2099621556077} is an apocalyptic number.

It is an amenable number.

2099621556077 is a deficient number, since it is larger than the sum of its proper divisors (72422812363).

2099621556077 is a wasteful number, since it uses less digits than its factorization.

2099621556077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735663.

The product of its (nonzero) digits is 14288400, while the sum is 59.

The spelling of 2099621556077 in words is "two trillion, ninety-nine billion, six hundred twenty-one million, five hundred fifty-six thousand, seventy-seven".