787390340391 has 12 divisors (see below), whose sum is σ = 1137349327920. Its totient is φ = 524923328160.

The previous prime is 787390340311. The next prime is 787390340441. The reversal of 787390340391 is 193043093787.

It is a happy number.

787390340391 is a `hidden beast` number, since 78 + 73 + 90 + 34 + 0 + 391 = 666.

It is not a de Polignac number, because 787390340391 - 2¹⁰ = 787390339367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (787390340311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2258086 + ... + 2583356.

It is an arithmetic number, because the mean of its divisors is an integer number (94779110660).

Almost surely, 2^787390340391 is an apocalyptic number.

787390340391 is a deficient number, since it is larger than the sum of its proper divisors (349958987529).

787390340391 is a wasteful number, since it uses less digits than its factorization.

787390340391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594246 (or 594243 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 787390340391 in words is "seven hundred eighty-seven billion, three hundred ninety million, three hundred forty thousand, three hundred ninety-one".