207197781942 has 16 divisors (see below), whose sum is σ = 436205856960. Its totient is φ = 65430878472.

The previous prime is 207197781937. The next prime is 207197781943. The reversal of 207197781942 is 249187791702.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207197781943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 908762088 + ... + 908762315.

It is an arithmetic number, because the mean of its divisors is an integer number (27262866060).

Almost surely, 2^207197781942 is an apocalyptic number.

207197781942 is an abundant number, since it is smaller than the sum of its proper divisors (229008075018).

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

207197781942 is a wasteful number, since it uses less digits than its factorization.

207197781942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817524427.

The product of its (nonzero) digits is 3556224, while the sum is 57.

The spelling of 207197781942 in words is "two hundred seven billion, one hundred ninety-seven million, seven hundred eighty-one thousand, nine hundred forty-two".