1620698851097 has 8 divisors (see below), whose sum is σ = 1716405274176. Its totient is φ = 1527095866032.

The previous prime is 1620698851081. The next prime is 1620698851141. The reversal of 1620698851097 is 7901588960261.

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 1620698851097 - 2⁴ = 1620698851081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620698851397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525857918 + ... + 525860999.

It is an arithmetic number, because the mean of its divisors is an integer number (214550659272).

Almost surely, 2^{1620698851097} is an apocalyptic number.

It is an amenable number.

1620698851097 is a deficient number, since it is larger than the sum of its proper divisors (95706423079).

1620698851097 is a wasteful number, since it uses less digits than its factorization.

1620698851097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051719007.

The product of its (nonzero) digits is 13063680, while the sum is 62.

The spelling of 1620698851097 in words is "one trillion, six hundred twenty billion, six hundred ninety-eight million, eight hundred fifty-one thousand, ninety-seven".