1961003115 has 80 divisors (see below), whose sum is σ = 3787001856. Its totient is φ = 967982400.

The previous prime is 1961003111. The next prime is 1961003123. The reversal of 1961003115 is 5113001691.

1961003115 is a `hidden beast` number, since 1 + 9 + 610 + 0 + 31 + 15 = 666.

It is not a de Polignac number, because 1961003115 - 2² = 1961003111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1961003111) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 285370 + ... + 292160.

Almost surely, 2^1961003115 is an apocalyptic number.

1961003115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1961003115 is a deficient number, since it is larger than the sum of its proper divisors (1825998741).

1961003115 is a wasteful number, since it uses less digits than its factorization.

1961003115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862 (or 6853 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 1961003115 is about 44283.2148223229. The cubic root of 1961003115 is about 1251.6784098769.

The spelling of 1961003115 in words is "one billion, nine hundred sixty-one million, three thousand, one hundred fifteen".