787942591646 has 64 divisors (see below), whose sum is σ = 1383826636800. Its totient is φ = 336344490720.

The previous prime is 787942591643. The next prime is 787942591649. The reversal of 787942591646 is 646195249787.

It is an interprime number because it is at equal distance from previous prime (787942591643) and next prime (787942591649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787942591643) 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, 247234865 + ... + 247238051.

It is an arithmetic number, because the mean of its divisors is an integer number (21622291200).

Almost surely, 2^787942591646 is an apocalyptic number.

787942591646 is a deficient number, since it is larger than the sum of its proper divisors (595884045154).

787942591646 is a wasteful number, since it uses less digits than its factorization.

787942591646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4534 (or 4520 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 68.

The spelling of 787942591646 in words is "seven hundred eighty-seven billion, nine hundred forty-two million, five hundred ninety-one thousand, six hundred forty-six".