1620073015556 has 12 divisors (see below), whose sum is σ = 2835287653968. Its totient is φ = 809990828712.

The previous prime is 1620073015501. The next prime is 1620073015559. The reversal of 1620073015556 is 6555103700261.

It is a super-2 number, since 2×1620073015556² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1620073015559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11339906 + ... + 11481881.

It is an arithmetic number, because the mean of its divisors is an integer number (236273971164).

Almost surely, 2^{1620073015556} is an apocalyptic number.

It is an amenable number.

1620073015556 is a deficient number, since it is larger than the sum of its proper divisors (1215214638412).

1620073015556 is a wasteful number, since it uses less digits than its factorization.

1620073015556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22839538 (or 22839536 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 1620073015556 in words is "one trillion, six hundred twenty billion, seventy-three million, fifteen thousand, five hundred fifty-six".