1620046646455 has 32 divisors (see below), whose sum is σ = 1970271072000. Its totient is φ = 1278699609600.

The previous prime is 1620046646437. The next prime is 1620046646459. The reversal of 1620046646455 is 5546466400261.

It is not a de Polignac number, because 1620046646455 - 2²⁷ = 1619912428727 is a prime.

It is a super-3 number, since 3×1620046646455³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1620046646399 and 1620046646408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620046646459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82230196 + ... + 82249894.

It is an arithmetic number, because the mean of its divisors is an integer number (61570971000).

Almost surely, 2^{1620046646455} is an apocalyptic number.

1620046646455 is a deficient number, since it is larger than the sum of its proper divisors (350224425545).

1620046646455 is a wasteful number, since it uses less digits than its factorization.

1620046646455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20575.

The product of its (nonzero) digits is 4147200, while the sum is 49.

The spelling of 1620046646455 in words is "one trillion, six hundred twenty billion, forty-six million, six hundred forty-six thousand, four hundred fifty-five".