101820342650 has 24 divisors (see below), whose sum is σ = 203953979964. Its totient is φ = 37595203200.

The previous prime is 101820342647. The next prime is 101820342697. The reversal of 101820342650 is 56243028101.

It is a Cunningham number, because it is equal to 319093²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 15062407441 + 86757935209 = 122729^2 + 294547^2 .

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, 78322691 + ... + 78323990.

Almost surely, 2^101820342650 is an apocalyptic number.

101820342650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101820342650 is an abundant number, since it is smaller than the sum of its proper divisors (102133637314).

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

101820342650 is a wasteful number, since it uses less digits than its factorization.

101820342650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156646706 (or 156646701 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 101820342650 in words is "one hundred one billion, eight hundred twenty million, three hundred forty-two thousand, six hundred fifty".