1012161645 has 48 divisors (see below), whose sum is σ = 1917115200. Its totient is φ = 489922560.

The previous prime is 1012161637. The next prime is 1012161653. The reversal of 1012161645 is 5461612101.

1012161645 is a `hidden beast` number, since 1 + 0 + 1 + 2 + 1 + 616 + 45 = 666.

It is an interprime number because it is at equal distance from previous prime (1012161637) and next prime (1012161653).

It is not a de Polignac number, because 1012161645 - 2³ = 1012161637 is a prime.

It is a super-3 number, since 3×1012161645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379326 + ... + 381984.

It is an arithmetic number, because the mean of its divisors is an integer number (39939900).

Almost surely, 2^1012161645 is an apocalyptic number.

1012161645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1012161645 is a deficient number, since it is larger than the sum of its proper divisors (904953555).

1012161645 is a wasteful number, since it uses less digits than its factorization.

1012161645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450 (or 3447 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1012161645 is about 31814.4879732489. The cubic root of 1012161645 is about 1004.0375578533.

Adding to 1012161645 its reverse (5461612101), we get a palindrome (6473773746).

The spelling of 1012161645 in words is "one billion, twelve million, one hundred sixty-one thousand, six hundred forty-five".