1953981696 has 36 divisors (see below), whose sum is σ = 5200442912. Its totient is φ = 651326976.

The previous prime is 1953981661. The next prime is 1953981697. The reversal of 1953981696 is 6961893591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1953981697) 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, 1271356 + ... + 1272891.

Almost surely, 2^1953981696 is an apocalyptic number.

1953981696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1953981696 is an abundant number, since it is smaller than the sum of its proper divisors (3246461216).

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

1953981696 is an equidigital number, since it uses as much as digits as its factorization.

1953981696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544266 (or 2544252 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 57.

The square root of 1953981696 is about 44203.8651703672. The cubic root of 1953981696 is about 1250.1827350983.

The spelling of 1953981696 in words is "one billion, nine hundred fifty-three million, nine hundred eighty-one thousand, six hundred ninety-six".