101155554640 has 80 divisors (see below), whose sum is σ = 282931355520. Its totient is φ = 32856537600.

The previous prime is 101155554629. The next prime is 101155554649. The reversal of 101155554640 is 46455551101.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 101155554640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101155554649) 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, 4742911 + ... + 4764190.

It is an arithmetic number, because the mean of its divisors is an integer number (3536641944).

Almost surely, 2^101155554640 is an apocalyptic number.

101155554640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101155554640 is an abundant number, since it is smaller than the sum of its proper divisors (181775800880).

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

101155554640 is a wasteful number, since it uses less digits than its factorization.

101155554640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507140 (or 9507134 counting only the distinct ones).

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 101155554640 in words is "one hundred one billion, one hundred fifty-five million, five hundred fifty-four thousand, six hundred forty".