101821452645 has 16 divisors (see below), whose sum is σ = 177724717632. Its totient is φ = 49367976960.

The previous prime is 101821452643. The next prime is 101821452671. The reversal of 101821452645 is 546254128101.

It is a happy number.

It is not a de Polignac number, because 101821452645 - 2¹ = 101821452643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101821452641) 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, 308549692 + ... + 308550021.

It is an arithmetic number, because the mean of its divisors is an integer number (11107794852).

Almost surely, 2^101821452645 is an apocalyptic number.

101821452645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101821452645 is a deficient number, since it is larger than the sum of its proper divisors (75903264987).

101821452645 is a wasteful number, since it uses less digits than its factorization.

101821452645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617099732.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 101821452645 in words is "one hundred one billion, eight hundred twenty-one million, four hundred fifty-two thousand, six hundred forty-five".