1953615671249 has 16 divisors (see below), whose sum is σ = 2258333732160. Its totient is φ = 1670245839360.

The previous prime is 1953615671201. The next prime is 1953615671251. The reversal of 1953615671249 is 9421765163591.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1953615671249 - 2¹² = 1953615667153 is a prime.

It is a super-2 number, since 2×1953615671249² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1953615611249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3811379 + ... + 4293464.

It is an arithmetic number, because the mean of its divisors is an integer number (141145858260).

Almost surely, 2^{1953615671249} is an apocalyptic number.

It is an amenable number.

1953615671249 is a deficient number, since it is larger than the sum of its proper divisors (304718060911).

1953615671249 is a wasteful number, since it uses less digits than its factorization.

1953615671249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106160.

The product of its digits is 12247200, while the sum is 59.

The spelling of 1953615671249 in words is "one trillion, nine hundred fifty-three billion, six hundred fifteen million, six hundred seventy-one thousand, two hundred forty-nine".