1961473481 has 16 divisors (see below), whose sum is σ = 2278793088. Its totient is φ = 1668537600.

The previous prime is 1961473469. The next prime is 1961473517. The reversal of 1961473481 is 1843741691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961473481 is a prime.

It is a super-2 number, since 2×1961473481² = 7694756433332514722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1961473411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2036 + ... + 62666.

It is an arithmetic number, because the mean of its divisors is an integer number (142424568).

Almost surely, 2^1961473481 is an apocalyptic number.

1961473481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1961473481 is a deficient number, since it is larger than the sum of its proper divisors (317319607).

1961473481 is a wasteful number, since it uses less digits than its factorization.

1961473481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60832.

The product of its digits is 145152, while the sum is 44.

The square root of 1961473481 is about 44288.5253875087. The cubic root of 1961473481 is about 1251.7784776936.

The spelling of 1961473481 in words is "one billion, nine hundred sixty-one million, four hundred seventy-three thousand, four hundred eighty-one".