102425336642 has 4 divisors (see below), whose sum is σ = 153638004966. Its totient is φ = 51212668320.

The previous prime is 102425336641. The next prime is 102425336647. The reversal of 102425336642 is 246633524201.

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., 55653056281 + 46772280361 = 235909^2 + 216269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 102425336596 and 102425336605.

It is not an unprimeable number, because it can be changed into a prime (102425336641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25606334159 + ... + 25606334162.

Almost surely, 2^102425336642 is an apocalyptic number.

102425336642 is a deficient number, since it is larger than the sum of its proper divisors (51212668324).

102425336642 is an equidigital number, since it uses as much as digits as its factorization.

102425336642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51212668323.

The product of its (nonzero) digits is 207360, while the sum is 38.

The spelling of 102425336642 in words is "one hundred two billion, four hundred twenty-five million, three hundred thirty-six thousand, six hundred forty-two".