919749135390 has 32 divisors (see below), whose sum is σ = 2213651202336. Its totient is φ = 244571627520.

The previous prime is 919749135373. The next prime is 919749135397. The reversal of 919749135390 is 93531947919.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919749135397) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 43414771 + ... + 43435950.

It is an arithmetic number, because the mean of its divisors is an integer number (69176600073).

Almost surely, 2^919749135390 is an apocalyptic number.

919749135390 is an abundant number, since it is smaller than the sum of its proper divisors (1293902066946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

919749135390 is a wasteful number, since it uses less digits than its factorization.

919749135390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86851084.

The product of its (nonzero) digits is 8266860, while the sum is 60.

The spelling of 919749135390 in words is "nine hundred nineteen billion, seven hundred forty-nine million, one hundred thirty-five thousand, three hundred ninety".