77107545947 has 2 divisors, whose sum is σ = 77107545948. Its totient is φ = 77107545946.

The previous prime is 77107545943. The next prime is 77107546003. The reversal of 77107545947 is 74954570177.

It is an a-pointer prime, because the next prime (77107546003) can be obtained adding 77107545947 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77107545947 - 2² = 77107545943 is a prime.

It is a super-2 number, since 2×77107545947² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77107545892 and 77107545901.

It is not a weakly prime, because it can be changed into another prime (77107545943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38553772973 + 38553772974.

It is an arithmetic number, because the mean of its divisors is an integer number (38553772974).

Almost surely, 2^77107545947 is an apocalyptic number.

77107545947 is a deficient number, since it is larger than the sum of its proper divisors (1).

77107545947 is an equidigital number, since it uses as much as digits as its factorization.

77107545947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8643600, while the sum is 56.

The spelling of 77107545947 in words is "seventy-seven billion, one hundred seven million, five hundred forty-five thousand, nine hundred forty-seven".