69135021977 has 4 divisors (see below), whose sum is σ = 79011453696. Its totient is φ = 59258590260.

The previous prime is 69135021961. The next prime is 69135021979. The reversal of 69135021977 is 77912053196.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 69135021977 - 2⁴ = 69135021961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (69135021979) 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, 4938215849 + ... + 4938215862.

It is an arithmetic number, because the mean of its divisors is an integer number (19752863424).

Almost surely, 2^69135021977 is an apocalyptic number.

It is an amenable number.

69135021977 is a deficient number, since it is larger than the sum of its proper divisors (9876431719).

69135021977 is an equidigital number, since it uses as much as digits as its factorization.

69135021977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9876431718.

The product of its (nonzero) digits is 714420, while the sum is 50.

The spelling of 69135021977 in words is "sixty-nine billion, one hundred thirty-five million, twenty-one thousand, nine hundred seventy-seven".