651032741956 has 9 divisors (see below), whose sum is σ = 1139310122461. Its totient is φ = 325515564112.

The previous prime is 651032741951. The next prime is 651032741971. The reversal of 651032741956 is 659147230156.

The square root of 651032741956 is 806866.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 105774552900 + 545258189056 = 325230^2 + 738416^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651032741951) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1412016 + ... + 1815448.

Almost surely, 2^651032741956 is an apocalyptic number.

651032741956 is the 806866-th square number.

It is an amenable number.

651032741956 is a deficient number, since it is larger than the sum of its proper divisors (488277380505).

651032741956 is an frugal number, since it uses more digits than its factorization.

651032741956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806870 (or 403435 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

Multiplying 651032741956 by its sum of digits (49), we get a square (31900604355844 = 5648062²).

The spelling of 651032741956 in words is "six hundred fifty-one billion, thirty-two million, seven hundred forty-one thousand, nine hundred fifty-six".