1961290485 has 192 divisors, whose sum is σ = 4610211840. Its totient is φ = 747273600.

The previous prime is 1961290403. The next prime is 1961290537. The reversal of 1961290485 is 5840921691.

It is not a de Polignac number, because 1961290485 - 2¹³ = 1961282293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1961290485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 63267420 + ... + 63267450.

It is an arithmetic number, because the mean of its divisors is an integer number (24011520).

Almost surely, 2^1961290485 is an apocalyptic number.

1961290485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1961290485 is an abundant number, since it is smaller than the sum of its proper divisors (2648921355).

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

1961290485 is a wasteful number, since it uses less digits than its factorization.

1961290485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 1961290485 is about 44286.4593865890. The cubic root of 1961290485 is about 1251.7395481880.

The spelling of 1961290485 in words is "one billion, nine hundred sixty-one million, two hundred ninety thousand, four hundred eighty-five".