651778492 has 6 divisors (see below), whose sum is σ = 1140612368. Its totient is φ = 325889244.

The previous prime is 651778433. The next prime is 651778493. The reversal of 651778492 is 294877156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651778493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81472308 + ... + 81472315.

Almost surely, 2^651778492 is an apocalyptic number.

It is an amenable number.

651778492 is a deficient number, since it is larger than the sum of its proper divisors (488833876).

651778492 is a wasteful number, since it uses less digits than its factorization.

651778492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162944627 (or 162944625 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 651778492 is about 25529.9528397528. The cubic root of 651778492 is about 867.0284368033.

The spelling of 651778492 in words is "six hundred fifty-one million, seven hundred seventy-eight thousand, four hundred ninety-two".