1949218503397 has 16 divisors (see below), whose sum is σ = 2197561000320. Its totient is φ = 1713497766400.

The previous prime is 1949218503389. The next prime is 1949218503457. The reversal of 1949218503397 is 7933058129491.

It is a cyclic number.

It is not a de Polignac number, because 1949218503397 - 2³ = 1949218503389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949218573397) 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, 19072897 + ... + 19174822.

It is an arithmetic number, because the mean of its divisors is an integer number (137347562520).

Almost surely, 2^{1949218503397} is an apocalyptic number.

It is an amenable number.

1949218503397 is a deficient number, since it is larger than the sum of its proper divisors (248342496923).

1949218503397 is a wasteful number, since it uses less digits than its factorization.

1949218503397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38247884.

The product of its (nonzero) digits is 14696640, while the sum is 61.

The spelling of 1949218503397 in words is "one trillion, nine hundred forty-nine billion, two hundred eighteen million, five hundred three thousand, three hundred ninety-seven".