1961791452 has 36 divisors (see below), whose sum is σ = 5079927216. Its totient is φ = 637980480.

The previous prime is 1961791441. The next prime is 1961791453. The reversal of 1961791452 is 2541971691.

1961791452 is a `hidden beast` number, since 19 + 617 + 9 + 14 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×1961791452³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1961791398 and 1961791407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961791453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 663088 + ... + 666039.

Almost surely, 2^1961791452 is an apocalyptic number.

1961791452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1961791452 is an abundant number, since it is smaller than the sum of its proper divisors (3118135764).

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

1961791452 is a wasteful number, since it uses less digits than its factorization.

1961791452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329178 (or 1329173 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 1961791452 is about 44292.1150093332. The cubic root of 1961791452 is about 1251.8461152379.

The spelling of 1961791452 in words is "one billion, nine hundred sixty-one million, seven hundred ninety-one thousand, four hundred fifty-two".