1961555098 has 16 divisors (see below), whose sum is σ = 3279381120. Its totient is φ = 874501056.

The previous prime is 1961555077. The next prime is 1961555119. The reversal of 1961555098 is 8905551691.

It is an interprime number because it is at equal distance from previous prime (1961555077) and next prime (1961555119).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1517586 + ... + 1518877.

It is an arithmetic number, because the mean of its divisors is an integer number (204961320).

Almost surely, 2^1961555098 is an apocalyptic number.

1961555098 is a deficient number, since it is larger than the sum of its proper divisors (1317826022).

1961555098 is a wasteful number, since it uses less digits than its factorization.

1961555098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3036501.

The product of its (nonzero) digits is 486000, while the sum is 49.

The square root of 1961555098 is about 44289.4468016931. The cubic root of 1961555098 is about 1251.7958396391.

The spelling of 1961555098 in words is "one billion, nine hundred sixty-one million, five hundred fifty-five thousand, ninety-eight".