1678974651 has 12 divisors (see below), whose sum is σ = 2470944528. Its totient is φ = 1098196944.

The previous prime is 1678974599. The next prime is 1678974667. The reversal of 1678974651 is 1564798761.

1678974651 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1678974651 - 2¹⁵ = 1678941883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1678974251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1759455 + ... + 1760408.

It is an arithmetic number, because the mean of its divisors is an integer number (205912044).

Almost surely, 2^1678974651 is an apocalyptic number.

1678974651 is a deficient number, since it is larger than the sum of its proper divisors (791969877).

1678974651 is a wasteful number, since it uses less digits than its factorization.

1678974651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519922 (or 3519919 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 1678974651 is about 40975.2931777187. The cubic root of 1678974651 is about 1188.5424923483.

The spelling of 1678974651 in words is "one billion, six hundred seventy-eight million, nine hundred seventy-four thousand, six hundred fifty-one".