3640146306261 has 16 divisors (see below), whose sum is σ = 5068368052224. Its totient is φ = 2319503410224.

The previous prime is 3640146306233. The next prime is 3640146306361. The reversal of 3640146306261 is 1626036410463.

It is not a de Polignac number, because 3640146306261 - 2⁷ = 3640146306133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640146306061) 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, 19786261 + ... + 19969386.

It is an arithmetic number, because the mean of its divisors is an integer number (316773003264).

Almost surely, 2^{3640146306261} is an apocalyptic number.

It is an amenable number.

3640146306261 is a deficient number, since it is larger than the sum of its proper divisors (1428221745963).

3640146306261 is a wasteful number, since it uses less digits than its factorization.

3640146306261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39757000.

The product of its (nonzero) digits is 373248, while the sum is 42.

The spelling of 3640146306261 in words is "three trillion, six hundred forty billion, one hundred forty-six million, three hundred six thousand, two hundred sixty-one".