70401763987 has 4 divisors (see below), whose sum is σ = 71047651840. Its totient is φ = 69755876136.

The previous prime is 70401763969. The next prime is 70401764047. The reversal of 70401763987 is 78936710407.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70401763987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70401763967) 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, 322943763 + ... + 322943980.

It is an arithmetic number, because the mean of its divisors is an integer number (17761912960).

Almost surely, 2^70401763987 is an apocalyptic number.

70401763987 is a deficient number, since it is larger than the sum of its proper divisors (645887853).

70401763987 is a wasteful number, since it uses less digits than its factorization.

70401763987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645887852.

The product of its (nonzero) digits is 1778112, while the sum is 52.

The spelling of 70401763987 in words is "seventy billion, four hundred one million, seven hundred sixty-three thousand, nine hundred eighty-seven".