1651566452 has 6 divisors (see below), whose sum is σ = 2890241298. Its totient is φ = 825783224.

The previous prime is 1651566437. The next prime is 1651566457. The reversal of 1651566452 is 2546651561.

It can be written as a sum of positive squares in only one way, i.e., 1647223396 + 4343056 = 40586^2 + 2084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651566457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206445803 + ... + 206445810.

It is an arithmetic number, because the mean of its divisors is an integer number (481706883).

Almost surely, 2^1651566452 is an apocalyptic number.

It is an amenable number.

1651566452 is a deficient number, since it is larger than the sum of its proper divisors (1238674846).

1651566452 is a wasteful number, since it uses less digits than its factorization.

1651566452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412891617 (or 412891615 counting only the distinct ones).

The product of its digits is 216000, while the sum is 41.

The square root of 1651566452 is about 40639.4691402336. The cubic root of 1651566452 is about 1182.0395761688.

The spelling of 1651566452 in words is "one billion, six hundred fifty-one million, five hundred sixty-six thousand, four hundred fifty-two".