7142776643640 has 128 divisors (see below), whose sum is σ = 23377308030720. Its totient is φ = 1731511987200.

The previous prime is 7142776643633. The next prime is 7142776643647. The reversal of 7142776643640 is 463466772417.

It is an interprime number because it is at equal distance from previous prime (7142776643633) and next prime (7142776643647).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7142776643647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37269660 + ... + 37460820.

It is an arithmetic number, because the mean of its divisors is an integer number (182635218990).

Almost surely, 2^{7142776643640} is an apocalyptic number.

It is an amenable number.

7142776643640 is an abundant number, since it is smaller than the sum of its proper divisors (16234531387080).

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

7142776643640 is a wasteful number, since it uses less digits than its factorization.

7142776643640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219493 (or 219489 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 57.

The spelling of 7142776643640 in words is "seven trillion, one hundred forty-two billion, seven hundred seventy-six million, six hundred forty-three thousand, six hundred forty".