1961402864 has 10 divisors (see below), whose sum is σ = 3800218080. Its totient is φ = 980701424.

The previous prime is 1961402831. The next prime is 1961402899. The reversal of 1961402864 is 4682041691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61293824 + ... + 61293855.

It is an arithmetic number, because the mean of its divisors is an integer number (380021808).

Almost surely, 2^1961402864 is an apocalyptic number.

It is an amenable number.

1961402864 is a deficient number, since it is larger than the sum of its proper divisors (1838815216).

1961402864 is a wasteful number, since it uses less digits than its factorization.

1961402864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122587687 (or 122587681 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1961402864 is about 44287.7281422292. The cubic root of 1961402864 is about 1251.7634553303.

The spelling of 1961402864 in words is "one billion, nine hundred sixty-one million, four hundred two thousand, eight hundred sixty-four".