1651161412 has 6 divisors (see below), whose sum is σ = 2889532478. Its totient is φ = 825580704.

The previous prime is 1651161403. The next prime is 1651161419. The reversal of 1651161412 is 2141611561.

It can be written as a sum of positive squares in only one way, i.e., 1639764036 + 11397376 = 40494^2 + 3376^2 .

It is not an unprimeable number, because it can be changed into a prime (1651161419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206395173 + ... + 206395180.

Almost surely, 2^1651161412 is an apocalyptic number.

It is an amenable number.

1651161412 is a deficient number, since it is larger than the sum of its proper divisors (1238371066).

1651161412 is a wasteful number, since it uses less digits than its factorization.

1651161412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412790357 (or 412790355 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1651161412 is about 40634.4855018493. The cubic root of 1651161412 is about 1181.9429381248.

Adding to 1651161412 its reverse (2141611561), we get a palindrome (3792772973).

The spelling of 1651161412 in words is "one billion, six hundred fifty-one million, one hundred sixty-one thousand, four hundred twelve".