19193661450690 has 64 divisors (see below), whose sum is σ = 46146855029760. Its totient is φ = 5109194301120.

The previous prime is 19193661450673. The next prime is 19193661450701. The reversal of 19193661450690 is 9605416639191.

It is a happy number.

It is a super-2 number, since 2×19193661450690² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98850121 + ... + 99044099.

It is an arithmetic number, because the mean of its divisors is an integer number (721044609840).

Almost surely, 2^{19193661450690} is an apocalyptic number.

19193661450690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19193661450690 is an abundant number, since it is smaller than the sum of its proper divisors (26953193579070).

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

19193661450690 is a wasteful number, since it uses less digits than its factorization.

19193661450690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199847.

The product of its (nonzero) digits is 9447840, while the sum is 60.

The spelling of 19193661450690 in words is "nineteen trillion, one hundred ninety-three billion, six hundred sixty-one million, four hundred fifty thousand, six hundred ninety".