1961129195 has 16 divisors (see below), whose sum is σ = 2397669120. Its totient is φ = 1539541344.

The previous prime is 1961129153. The next prime is 1961129237. The reversal of 1961129195 is 5919211691.

It is an interprime number because it is at equal distance from previous prime (1961129153) and next prime (1961129237).

It is a cyclic number.

It is not a de Polignac number, because 1961129195 - 2¹² = 1961125099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76976 + ... + 99234.

It is an arithmetic number, because the mean of its divisors is an integer number (149854320).

Almost surely, 2^1961129195 is an apocalyptic number.

1961129195 is a deficient number, since it is larger than the sum of its proper divisors (436539925).

1961129195 is a wasteful number, since it uses less digits than its factorization.

1961129195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22594.

The product of its digits is 43740, while the sum is 44.

The square root of 1961129195 is about 44284.6383636583. The cubic root of 1961129195 is about 1251.7052342830.

The spelling of 1961129195 in words is "one billion, nine hundred sixty-one million, one hundred twenty-nine thousand, one hundred ninety-five".