1020165113640 has 64 divisors (see below), whose sum is σ = 3092046874560. Its totient is φ = 269239449600.

The previous prime is 1020165113599. The next prime is 1020165113647. The reversal of 1020165113640 is 463115610201.

It is a happy number.

It is a super-2 number, since 2×1020165113640² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1020165113598 and 1020165113607.

It is not an unprimeable number, because it can be changed into a prime (1020165113647) 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, 43809886 + ... + 43833165.

It is an arithmetic number, because the mean of its divisors is an integer number (48313232415).

Almost surely, 2^{1020165113640} is an apocalyptic number.

1020165113640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020165113640 is an abundant number, since it is smaller than the sum of its proper divisors (2071881760920).

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

1020165113640 is a wasteful number, since it uses less digits than its factorization.

1020165113640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87643162 (or 87643158 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 1020165113640 in words is "one trillion, twenty billion, one hundred sixty-five million, one hundred thirteen thousand, six hundred forty".