1061620078 has 4 divisors (see below), whose sum is σ = 1592430120. Its totient is φ = 530810038.

The previous prime is 1061620031. The next prime is 1061620103. The reversal of 1061620078 is 8700261601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8700261601 = 5741 ⋅1515461.

It is a super-2 number, since 2×1061620078² = 2254074380025452168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265405018 + ... + 265405021.

It is an arithmetic number, because the mean of its divisors is an integer number (398107530).

Almost surely, 2^1061620078 is an apocalyptic number.

1061620078 is a deficient number, since it is larger than the sum of its proper divisors (530810042).

1061620078 is an equidigital number, since it uses as much as digits as its factorization.

1061620078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530810041.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1061620078 is about 32582.5118430117. The cubic root of 1061620078 is about 1020.1320084177.

Adding to 1061620078 its reverse (8700261601), we get a palindrome (9761881679).

The spelling of 1061620078 in words is "one billion, sixty-one million, six hundred twenty thousand, seventy-eight".