1961558342 has 4 divisors (see below), whose sum is σ = 2942337516. Its totient is φ = 980779170.

The previous prime is 1961558303. The next prime is 1961558407. The reversal of 1961558342 is 2438551691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1961558342² = 7695422258139577928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1961558293 and 1961558302.

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, 490389584 + ... + 490389587.

It is an arithmetic number, because the mean of its divisors is an integer number (735584379).

Almost surely, 2^1961558342 is an apocalyptic number.

1961558342 is a deficient number, since it is larger than the sum of its proper divisors (980779174).

1961558342 is an equidigital number, since it uses as much as digits as its factorization.

1961558342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980779173.

The product of its digits is 259200, while the sum is 44.

The square root of 1961558342 is about 44289.4834243977. The cubic root of 1961558342 is about 1251.7965297078.

The spelling of 1961558342 in words is "one billion, nine hundred sixty-one million, five hundred fifty-eight thousand, three hundred forty-two".