1634918793497 has 4 divisors (see below), whose sum is σ = 1783547774736. Its totient is φ = 1486289812260.

The previous prime is 1634918793481. The next prime is 1634918793499. The reversal of 1634918793497 is 7943978194361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1634918793497 - 2⁴ = 1634918793481 is a prime.

It is a super-2 number, since 2×1634918793497² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1634918793497.

It is not an unprimeable number, because it can be changed into a prime (1634918793499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74314490603 + ... + 74314490624.

It is an arithmetic number, because the mean of its divisors is an integer number (445886943684).

Almost surely, 2^{1634918793497} is an apocalyptic number.

It is an amenable number.

1634918793497 is a deficient number, since it is larger than the sum of its proper divisors (148628981239).

1634918793497 is a wasteful number, since it uses less digits than its factorization.

1634918793497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148628981238.

The product of its digits is 246903552, while the sum is 71.

The spelling of 1634918793497 in words is "one trillion, six hundred thirty-four billion, nine hundred eighteen million, seven hundred ninety-three thousand, four hundred ninety-seven".