42494936402 has 4 divisors (see below), whose sum is σ = 63742404606. Its totient is φ = 21247468200.

The previous prime is 42494936371. The next prime is 42494936423. The reversal of 42494936402 is 20463949424.

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., 28862272321 + 13632664081 = 169889^2 + 116759^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10623734099 + ... + 10623734102.

Almost surely, 2^42494936402 is an apocalyptic number.

42494936402 is a deficient number, since it is larger than the sum of its proper divisors (21247468204).

42494936402 is a wasteful number, since it uses less digits than its factorization.

42494936402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21247468203.

The product of its (nonzero) digits is 1492992, while the sum is 47.

Adding to 42494936402 its sum of digits (47), we get a square (42494936449 = 206143²).

The spelling of 42494936402 in words is "forty-two billion, four hundred ninety-four million, nine hundred thirty-six thousand, four hundred two".