156205221052 has 6 divisors (see below), whose sum is σ = 273359136848. Its totient is φ = 78102610524.

The previous prime is 156205221043. The next prime is 156205221059. The reversal of 156205221052 is 250122502651.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156205221059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19525652628 + ... + 19525652635.

Almost surely, 2^156205221052 is an apocalyptic number.

It is an amenable number.

156205221052 is a deficient number, since it is larger than the sum of its proper divisors (117153915796).

156205221052 is a wasteful number, since it uses less digits than its factorization.

156205221052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39051305267 (or 39051305265 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 156205221052 in words is "one hundred fifty-six billion, two hundred five million, two hundred twenty-one thousand, fifty-two".