940645651 has 16 divisors (see below), whose sum is σ = 1079659008. Its totient is φ = 817926120.

The previous prime is 940645633. The next prime is 940645663. The reversal of 940645651 is 156546049.

It is a happy number.

It is not a de Polignac number, because 940645651 - 2¹³ = 940637459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (940645621) 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, 15250 + ... + 45976.

It is an arithmetic number, because the mean of its divisors is an integer number (67478688).

Almost surely, 2^940645651 is an apocalyptic number.

940645651 is a deficient number, since it is larger than the sum of its proper divisors (139013357).

940645651 is a wasteful number, since it uses less digits than its factorization.

940645651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30783 (or 30761 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 940645651 is about 30669.9470328855. The cubic root of 940645651 is about 979.8103377932.

The spelling of 940645651 in words is "nine hundred forty million, six hundred forty-five thousand, six hundred fifty-one".