1954395867634 has 16 divisors (see below), whose sum is σ = 3547474852608. Its totient is φ = 788327744832.

The previous prime is 1954395867623. The next prime is 1954395867643. The reversal of 1954395867634 is 4367685934591.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4105873434 + ... + 4105873909.

It is an arithmetic number, because the mean of its divisors is an integer number (221717178288).

Almost surely, 2^{1954395867634} is an apocalyptic number.

1954395867634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1954395867634 is a deficient number, since it is larger than the sum of its proper divisors (1593078984974).

1954395867634 is a wasteful number, since it uses less digits than its factorization.

1954395867634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211747369.

The product of its digits is 587865600, while the sum is 70.

The spelling of 1954395867634 in words is "one trillion, nine hundred fifty-four billion, three hundred ninety-five million, eight hundred sixty-seven thousand, six hundred thirty-four".