1612989477 has 32 divisors (see below), whose sum is σ = 2744064000. Its totient is φ = 926115120.

The previous prime is 1612989467. The next prime is 1612989481. The reversal of 1612989477 is 7749892161.

1612989477 is a `hidden beast` number, since 161 + 2 + 9 + 8 + 9 + 477 = 666.

It is not a de Polignac number, because 1612989477 - 2⁷ = 1612989349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1612989457) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137277 + ... + 148562.

It is an arithmetic number, because the mean of its divisors is an integer number (85752000).

Almost surely, 2^1612989477 is an apocalyptic number.

It is an amenable number.

1612989477 is a deficient number, since it is larger than the sum of its proper divisors (1131074523).

1612989477 is a wasteful number, since it uses less digits than its factorization.

1612989477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285878 (or 285872 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 1612989477 is about 40162.0402494694. The cubic root of 1612989477 is about 1172.7636902059.

The spelling of 1612989477 in words is "one billion, six hundred twelve million, nine hundred eighty-nine thousand, four hundred seventy-seven".