1920715256290 has 16 divisors (see below), whose sum is σ = 3660657312312. Its totient is φ = 723092802304.

The previous prime is 1920715256249. The next prime is 1920715256309. The reversal of 1920715256290 is 926525170291.

It can be written as a sum of positive squares in 4 ways, for example, as 1401498454801 + 519216801489 = 1183849^2 + 720567^2 .

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, 5649162349 + ... + 5649162688.

Almost surely, 2^{1920715256290} is an apocalyptic number.

1920715256290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1920715256290 is a deficient number, since it is larger than the sum of its proper divisors (1739942056022).

1920715256290 is a wasteful number, since it uses less digits than its factorization.

1920715256290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11298325061.

The product of its (nonzero) digits is 680400, while the sum is 49.

The spelling of 1920715256290 in words is "one trillion, nine hundred twenty billion, seven hundred fifteen million, two hundred fifty-six thousand, two hundred ninety".