1620546442623 has 6 divisors (see below), whose sum is σ = 2340789306024. Its totient is φ = 1080364295076.

The previous prime is 1620546442597. The next prime is 1620546442643. The reversal of 1620546442623 is 3262446450261.

It is a happy number.

1620546442623 is a `hidden beast` number, since 1 + 6 + 2 + 0 + 546 + 4 + 42 + 62 + 3 = 666.

It is not a de Polignac number, because 1620546442623 - 2⁵ = 1620546442591 is a prime.

It is a super-2 number, since 2×1620546442623² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620546442643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90030357915 + ... + 90030357932.

It is an arithmetic number, because the mean of its divisors is an integer number (390131551004).

Almost surely, 2^{1620546442623} is an apocalyptic number.

1620546442623 is a deficient number, since it is larger than the sum of its proper divisors (720242863401).

1620546442623 is a wasteful number, since it uses less digits than its factorization.

1620546442623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180060715853 (or 180060715850 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 1620546442623 in words is "one trillion, six hundred twenty billion, five hundred forty-six million, four hundred forty-two thousand, six hundred twenty-three".