3947755651 has 8 divisors (see below), whose sum is σ = 4512108384. Its totient is φ = 3383499840.

The previous prime is 3947755649. The next prime is 3947755661. The reversal of 3947755651 is 1565577493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3947755651 - 2¹ = 3947755649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3947755661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121521 + ... + 150541.

It is an arithmetic number, because the mean of its divisors is an integer number (564013548).

Almost surely, 2^3947755651 is an apocalyptic number.

3947755651 is a deficient number, since it is larger than the sum of its proper divisors (564352733).

3947755651 is a wasteful number, since it uses less digits than its factorization.

3947755651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48461.

The product of its digits is 3969000, while the sum is 52.

The square root of 3947755651 is about 62831.1678309420. The cubic root of 3947755651 is about 1580.4596818493.

The spelling of 3947755651 in words is "three billion, nine hundred forty-seven million, seven hundred fifty-five thousand, six hundred fifty-one".