1355777890 has 16 divisors (see below), whose sum is σ = 2441839608. Its totient is φ = 541991296.

The previous prime is 1355777881. The next prime is 1355777909. The reversal of 1355777890 is 987775531.

1355777890 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 615883489 + 739894401 = 24817^2 + 27201^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21787 + ... + 56446.

Almost surely, 2^1355777890 is an apocalyptic number.

1355777890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1355777890 is a deficient number, since it is larger than the sum of its proper divisors (1086061718).

1355777890 is a wasteful number, since it uses less digits than its factorization.

1355777890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79973.

The product of its (nonzero) digits is 1852200, while the sum is 52.

The square root of 1355777890 is about 36820.8893157132. The cubic root of 1355777890 is about 1106.7839409557.

The spelling of 1355777890 in words is "one billion, three hundred fifty-five million, seven hundred seventy-seven thousand, eight hundred ninety".