156203065402 has 4 divisors (see below), whose sum is σ = 234304598106. Its totient is φ = 78101532700.

The previous prime is 156203065393. The next prime is 156203065409. The reversal of 156203065402 is 204560302651.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204560302651 = 491 ⋅416619761.

It can be written as a sum of positive squares in only one way, i.e., 149822410761 + 6380654641 = 387069^2 + 79879^2 .

It is not an unprimeable number, because it can be changed into a prime (156203065409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39050766349 + ... + 39050766352.

Almost surely, 2^156203065402 is an apocalyptic number.

156203065402 is a deficient number, since it is larger than the sum of its proper divisors (78101532704).

156203065402 is an equidigital number, since it uses as much as digits as its factorization.

156203065402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78101532703.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 156203065402 in words is "one hundred fifty-six billion, two hundred three million, sixty-five thousand, four hundred two".