1949407995549 has 16 divisors (see below), whose sum is σ = 2973505966208. Its totient is φ = 1112830114752.

The previous prime is 1949407995547. The next prime is 1949407995551. The reversal of 1949407995549 is 9455997049491.

It is an interprime number because it is at equal distance from previous prime (1949407995547) and next prime (1949407995551).

It is not a de Polignac number, because 1949407995549 - 2¹ = 1949407995547 is a prime.

It is a super-2 number, since 2×1949407995549² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949407995547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46533202 + ... + 46575075.

It is an arithmetic number, because the mean of its divisors is an integer number (185844122888).

Almost surely, 2^{1949407995549} is an apocalyptic number.

It is an amenable number.

1949407995549 is a deficient number, since it is larger than the sum of its proper divisors (1024097970659).

1949407995549 is an equidigital number, since it uses as much as digits as its factorization.

1949407995549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93109284.

The product of its (nonzero) digits is 661348800, while the sum is 75.

The spelling of 1949407995549 in words is "one trillion, nine hundred forty-nine billion, four hundred seven million, nine hundred ninety-five thousand, five hundred forty-nine".