219097497861 has 20 divisors (see below), whose sum is σ = 357047775744. Its totient is φ = 132786361800.

The previous prime is 219097497859. The next prime is 219097497911. The reversal of 219097497861 is 168794790912.

It is not a de Polignac number, because 219097497861 - 2¹ = 219097497859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219097497061) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 122949445 + ... + 122951226.

Almost surely, 2^219097497861 is an apocalyptic number.

It is an amenable number.

219097497861 is a deficient number, since it is larger than the sum of its proper divisors (137950277883).

219097497861 is a wasteful number, since it uses less digits than its factorization.

219097497861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245900694 (or 245900685 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 219097497861 in words is "two hundred nineteen billion, ninety-seven million, four hundred ninety-seven thousand, eight hundred sixty-one".