1655643434 has 4 divisors (see below), whose sum is σ = 2483465154. Its totient is φ = 827821716.

The previous prime is 1655643419. The next prime is 1655643463. The reversal of 1655643434 is 4343465561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1623687025 + 31956409 = 40295^2 + 5653^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1655643391 and 1655643400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413910857 + ... + 413910860.

Almost surely, 2^1655643434 is an apocalyptic number.

1655643434 is a deficient number, since it is larger than the sum of its proper divisors (827821720).

1655643434 is an equidigital number, since it uses as much as digits as its factorization.

1655643434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827821719.

The product of its digits is 518400, while the sum is 41.

The square root of 1655643434 is about 40689.5985971845. The cubic root of 1655643434 is about 1183.0114200105.

The spelling of 1655643434 in words is "one billion, six hundred fifty-five million, six hundred forty-three thousand, four hundred thirty-four".