156661561050 has 24 divisors (see below), whose sum is σ = 388520671776. Its totient is φ = 41776416240.

The previous prime is 156661561019. The next prime is 156661561079. The reversal of 156661561050 is 50165166651.

It is a junction number, because it is equal to n+sod(n) for n = 156661560993 and 156661561011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522205054 + ... + 522205353.

It is an arithmetic number, because the mean of its divisors is an integer number (16188361324).

Almost surely, 2^156661561050 is an apocalyptic number.

156661561050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

156661561050 is an abundant number, since it is smaller than the sum of its proper divisors (231859110726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156661561050 is a wasteful number, since it uses less digits than its factorization.

156661561050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044410422 (or 1044410417 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 42.

The spelling of 156661561050 in words is "one hundred fifty-six billion, six hundred sixty-one million, five hundred sixty-one thousand, fifty".