2065156780 has 24 divisors (see below), whose sum is σ = 4339051920. Its totient is φ = 825639360.

The previous prime is 2065156771. The next prime is 2065156823. The reversal of 2065156780 is 876515602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15135 + ... + 66025.

It is an arithmetic number, because the mean of its divisors is an integer number (180793830).

Almost surely, 2^2065156780 is an apocalyptic number.

2065156780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2065156780 is an abundant number, since it is smaller than the sum of its proper divisors (2273895140).

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

2065156780 is a wasteful number, since it uses less digits than its factorization.

2065156780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52929 (or 52927 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 2065156780 is about 45443.9960830911. The cubic root of 2065156780 is about 1273.4571685587.

The spelling of 2065156780 in words is "two billion, sixty-five million, one hundred fifty-six thousand, seven hundred eighty".