1678485651 has 8 divisors (see below), whose sum is σ = 2335284480. Its totient is φ = 1070338632.

The previous prime is 1678485643. The next prime is 1678485661. The reversal of 1678485651 is 1565848761.

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

It is not a de Polignac number, because 1678485651 - 2³ = 1678485643 is a prime.

It is a super-2 number, since 2×1678485651² = 5634628161225787602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1678485594 and 1678485603.

It is not an unprimeable number, because it can be changed into a prime (1678485661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12162871 + ... + 12163008.

It is an arithmetic number, because the mean of its divisors is an integer number (291910560).

Almost surely, 2^1678485651 is an apocalyptic number.

1678485651 is a deficient number, since it is larger than the sum of its proper divisors (656798829).

1678485651 is a wasteful number, since it uses less digits than its factorization.

1678485651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24325905.

The product of its digits is 1612800, while the sum is 51.

The square root of 1678485651 is about 40969.3257327967. The cubic root of 1678485651 is about 1188.4270938000.

The spelling of 1678485651 in words is "one billion, six hundred seventy-eight million, four hundred eighty-five thousand, six hundred fifty-one".