699794178442 has 4 divisors (see below), whose sum is σ = 1049691267666. Its totient is φ = 349897089220.

The previous prime is 699794178439. The next prime is 699794178449. The reversal of 699794178442 is 244871497996.

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

It can be written as a sum of positive squares in only one way, i.e., 553641653041 + 146152525401 = 744071^2 + 382299^2 .

It is not an unprimeable number, because it can be changed into a prime (699794178449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174948544609 + ... + 174948544612.

Almost surely, 2^699794178442 is an apocalyptic number.

699794178442 is a deficient number, since it is larger than the sum of its proper divisors (349897089224).

699794178442 is a wasteful number, since it uses less digits than its factorization.

699794178442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349897089223.

The product of its digits is 219469824, while the sum is 70.

The spelling of 699794178442 in words is "six hundred ninety-nine billion, seven hundred ninety-four million, one hundred seventy-eight thousand, four hundred forty-two".