3640142766 has 32 divisors (see below), whose sum is σ = 7883654688. Its totient is φ = 1113851520.

The previous prime is 3640142743. The next prime is 3640142801. The reversal of 3640142766 is 6672410463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114801 + ... + 143036.

It is an arithmetic number, because the mean of its divisors is an integer number (246364209).

Almost surely, 2^3640142766 is an apocalyptic number.

3640142766 is an abundant number, since it is smaller than the sum of its proper divisors (4243511922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3640142766 is a wasteful number, since it uses less digits than its factorization.

3640142766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258036.

The product of its (nonzero) digits is 145152, while the sum is 39.

The square root of 3640142766 is about 60333.5956660963. The cubic root of 3640142766 is about 1538.2944470390.

The spelling of 3640142766 in words is "three billion, six hundred forty million, one hundred forty-two thousand, seven hundred sixty-six".