11899478738 has 16 divisors (see below), whose sum is σ = 20406482304. Its totient is φ = 5097932640.

The previous prime is 11899478699. The next prime is 11899478761. The reversal of 11899478738 is 83787499811.

It is a super-2 number, since 2×11899478738² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 113195 + ... + 191342.

It is an arithmetic number, because the mean of its divisors is an integer number (1275405144).

Almost surely, 2^11899478738 is an apocalyptic number.

11899478738 is a deficient number, since it is larger than the sum of its proper divisors (8507003566).

11899478738 is a wasteful number, since it uses less digits than its factorization.

11899478738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307337.

The product of its digits is 24385536, while the sum is 65.

The spelling of 11899478738 in words is "eleven billion, eight hundred ninety-nine million, four hundred seventy-eight thousand, seven hundred thirty-eight".