1620158956 has 48 divisors (see below), whose sum is σ = 3403179360. Its totient is φ = 666731520.

The previous prime is 1620158941. The next prime is 1620158957. The reversal of 1620158956 is 6598510261.

It is not an unprimeable number, because it can be changed into a prime (1620158957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31435 + ... + 65026.

It is an arithmetic number, because the mean of its divisors is an integer number (70899570).

Almost surely, 2^1620158956 is an apocalyptic number.

It is an amenable number.

1620158956 is an abundant number, since it is smaller than the sum of its proper divisors (1783020404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1620158956 is a wasteful number, since it uses less digits than its factorization.

1620158956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96514 (or 96512 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 1620158956 is about 40251.1981933457. The cubic root of 1620158956 is about 1174.4987041623.

It can be divided in two parts, 16201 and 58956, that added together give a palindrome (75157).

The spelling of 1620158956 in words is "one billion, six hundred twenty million, one hundred fifty-eight thousand, nine hundred fifty-six".