163745293690 has 36 divisors (see below), whose sum is σ = 323999945262. Its totient is φ = 59538624640.

The previous prime is 163745293687. The next prime is 163745293727. The reversal of 163745293690 is 96392547361.

It can be written as a sum of positive squares in 3 ways, for example, as 151178659489 + 12566634201 = 388817^2 + 112101^2 .

It is a super-2 number, since 2×163745293690² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14070114 + ... + 14081746.

Almost surely, 2^163745293690 is an apocalyptic number.

163745293690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163745293690 is a deficient number, since it is larger than the sum of its proper divisors (160254651572).

163745293690 is an frugal number, since it uses more digits than its factorization.

163745293690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23295 (or 11651 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 55.

The spelling of 163745293690 in words is "one hundred sixty-three billion, seven hundred forty-five million, two hundred ninety-three thousand, six hundred ninety".