101609155780 has 48 divisors (see below), whose sum is σ = 233880655680. Its totient is φ = 36773654400.

The previous prime is 101609155777. The next prime is 101609155783. The reversal of 101609155780 is 87551906101.

It is an interprime number because it is at equal distance from previous prime (101609155777) and next prime (101609155783).

It is not an unprimeable number, because it can be changed into a prime (101609155783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048035 + ... + 1140874.

It is an arithmetic number, because the mean of its divisors is an integer number (4872513660).

Almost surely, 2^101609155780 is an apocalyptic number.

101609155780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101609155780 is an abundant number, since it is smaller than the sum of its proper divisors (132271499900).

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

101609155780 is a wasteful number, since it uses less digits than its factorization.

101609155780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189140 (or 2189138 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 43.

The spelling of 101609155780 in words is "one hundred one billion, six hundred nine million, one hundred fifty-five thousand, seven hundred eighty".