1651617138 has 8 divisors (see below), whose sum is σ = 3303234288. Its totient is φ = 550539044.

The previous prime is 1651617131. The next prime is 1651617169. The reversal of 1651617138 is 8317161561.

It is a sphenic number, since it is the product of 3 distinct primes.

1651617138 is an admirable number.

It is a super-2 number, since 2×1651617138² = 5455678341070622088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1651617096 and 1651617105.

It is not an unprimeable number, because it can be changed into a prime (1651617131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137634756 + ... + 137634767.

It is an arithmetic number, because the mean of its divisors is an integer number (412904286).

Almost surely, 2^1651617138 is an apocalyptic number.

1651617138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1651617138 is a wasteful number, since it uses less digits than its factorization.

1651617138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275269528.

The product of its digits is 30240, while the sum is 39.

The square root of 1651617138 is about 40640.0927410359. The cubic root of 1651617138 is about 1182.0516681730.

Adding to 1651617138 its reverse (8317161561), we get a palindrome (9968778699).

The spelling of 1651617138 in words is "one billion, six hundred fifty-one million, six hundred seventeen thousand, one hundred thirty-eight".