70779927987 has 12 divisors (see below), whose sum is σ = 104731276104. Its totient is φ = 46035725280.

The previous prime is 70779927947. The next prime is 70779928003. The reversal of 70779927987 is 78972997707.

It is a happy number.

It is not a de Polignac number, because 70779927987 - 2¹⁶ = 70779862451 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70779927937) 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, 95907393 + ... + 95908130.

It is an arithmetic number, because the mean of its divisors is an integer number (8727606342).

Almost surely, 2^70779927987 is an apocalyptic number.

70779927987 is a deficient number, since it is larger than the sum of its proper divisors (33951348117).

70779927987 is a wasteful number, since it uses less digits than its factorization.

70779927987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191815570 (or 191815567 counting only the distinct ones).

The product of its (nonzero) digits is 196036848, while the sum is 72.

The spelling of 70779927987 in words is "seventy billion, seven hundred seventy-nine million, nine hundred twenty-seven thousand, nine hundred eighty-seven".