77527650091 has 4 divisors (see below), whose sum is σ = 77528904832. Its totient is φ = 77526395352.

The previous prime is 77527650089. The next prime is 77527650121. The reversal of 77527650091 is 19005672577.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77527650091 - 2¹ = 77527650089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77527650691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529611 + ... + 659956.

It is an arithmetic number, because the mean of its divisors is an integer number (19382226208).

Almost surely, 2^77527650091 is an apocalyptic number.

77527650091 is a deficient number, since it is larger than the sum of its proper divisors (1254741).

77527650091 is a wasteful number, since it uses less digits than its factorization.

77527650091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254740.

The product of its (nonzero) digits is 926100, while the sum is 49.

The spelling of 77527650091 in words is "seventy-seven billion, five hundred twenty-seven million, six hundred fifty thousand, ninety-one".