1949900212789 has 8 divisors (see below), whose sum is σ = 2064737578968. Its totient is φ = 1835078108160.

The previous prime is 1949900212747. The next prime is 1949900212879. The reversal of 1949900212789 is 9872120099491.

It can be written as a sum of positive squares in 4 ways, for example, as 553473505764 + 1396426707025 = 743958^2 + 1181705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1949900212789 - 2¹⁵ = 1949900180021 is a prime.

It is a super-2 number, since 2×1949900212789² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949900212709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3551812 + ... + 4063885.

It is an arithmetic number, because the mean of its divisors is an integer number (258092197371).

Almost surely, 2^{1949900212789} is an apocalyptic number.

It is an amenable number.

1949900212789 is a deficient number, since it is larger than the sum of its proper divisors (114837366179).

1949900212789 is a wasteful number, since it uses less digits than its factorization.

1949900212789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630775.

The product of its (nonzero) digits is 5878656, while the sum is 61.

The spelling of 1949900212789 in words is "one trillion, nine hundred forty-nine billion, nine hundred million, two hundred twelve thousand, seven hundred eighty-nine".