1045663651 has 16 divisors (see below), whose sum is σ = 1150041600. Its totient is φ = 946332288.

The previous prime is 1045663649. The next prime is 1045663657. The reversal of 1045663651 is 1563665401.

It is a cyclic number.

It is not a de Polignac number, because 1045663651 - 2¹ = 1045663649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1045663651.

It is not an unprimeable number, because it can be changed into a prime (1045663657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 649890 + ... + 651496.

It is an arithmetic number, because the mean of its divisors is an integer number (71877600).

Almost surely, 2^1045663651 is an apocalyptic number.

1045663651 is a deficient number, since it is larger than the sum of its proper divisors (104377949).

1045663651 is a wasteful number, since it uses less digits than its factorization.

1045663651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1045663651 is about 32336.7229477571. The cubic root of 1045663651 is about 1014.9952359698.

The spelling of 1045663651 in words is "one billion, forty-five million, six hundred sixty-three thousand, six hundred fifty-one".