1948749966520 has 48 divisors (see below), whose sum is σ = 5100554764440. Its totient is φ = 668142844992.

The previous prime is 1948749966437. The next prime is 1948749966551. The reversal of 1948749966520 is 256699478491.

It is a happy number.

It is a super-2 number, since 2×1948749966520² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 1948749966520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 497128134 + ... + 497132053.

Almost surely, 2^{1948749966520} is an apocalyptic number.

1948749966520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1948749966520 is an abundant number, since it is smaller than the sum of its proper divisors (3151804797920).

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

1948749966520 is a wasteful number, since it uses less digits than its factorization.

1948749966520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994260212 (or 994260201 counting only the distinct ones).

The product of its (nonzero) digits is 235146240, while the sum is 70.

The spelling of 1948749966520 in words is "one trillion, nine hundred forty-eight billion, seven hundred forty-nine million, nine hundred sixty-six thousand, five hundred twenty".