101538420555 has 64 divisors (see below), whose sum is σ = 191102446080. Its totient is φ = 45386956800.

The previous prime is 101538420547. The next prime is 101538420559. The reversal of 101538420555 is 555024835101.

It is not a de Polignac number, because 101538420555 - 2³ = 101538420547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (101538420559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1710411 + ... + 1768779.

It is an arithmetic number, because the mean of its divisors is an integer number (2985975720).

Almost surely, 2^101538420555 is an apocalyptic number.

101538420555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

101538420555 is a deficient number, since it is larger than the sum of its proper divisors (89564025525).

101538420555 is a wasteful number, since it uses less digits than its factorization.

101538420555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59212.

The product of its (nonzero) digits is 120000, while the sum is 39.

The spelling of 101538420555 in words is "one hundred one billion, five hundred thirty-eight million, four hundred twenty thousand, five hundred fifty-five".