77907400787 has 8 divisors (see below), whose sum is σ = 79811999232. Its totient is φ = 76003012800.

The previous prime is 77907400763. The next prime is 77907400859. The reversal of 77907400787 is 78700470977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77907400787 - 2⁶ = 77907400723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77907400687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908837 + ... + 990857.

It is an arithmetic number, because the mean of its divisors is an integer number (9976499904).

Almost surely, 2^77907400787 is an apocalyptic number.

77907400787 is a deficient number, since it is larger than the sum of its proper divisors (1904598445).

77907400787 is a wasteful number, since it uses less digits than its factorization.

77907400787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105229.

The product of its (nonzero) digits is 4840416, while the sum is 56.

The spelling of 77907400787 in words is "seventy-seven billion, nine hundred seven million, four hundred thousand, seven hundred eighty-seven".