19129260437401 has 3 divisors (see below), whose sum is σ = 19129264811103. Its totient is φ = 19129256063700.

The previous prime is 19129260437393. The next prime is 19129260437431. The reversal of 19129260437401 is 10473406292191.

The square root of 19129260437401 is 4373701.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 9273553653001 + 9855706784400 = 3045251^2 + 3139380^2 .

It is not a de Polignac number, because 19129260437401 - 2³ = 19129260437393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19129260437431) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2186851 + ... + 6560551.

It is an arithmetic number, because the mean of its divisors is an integer number (6376421603701).

Almost surely, 2^{19129260437401} is an apocalyptic number.

19129260437401 is the 4373701-st square number.

19129260437401 is the 2186851-st centered octagonal number.

It is an amenable number.

19129260437401 is a deficient number, since it is larger than the sum of its proper divisors (4373702).

19129260437401 is an frugal number, since it uses more digits than its factorization.

19129260437401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8747402 (or 4373701 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

Multiplying 19129260437401 by its sum of digits (49), we get a square (937333761432649 = 30615907²).

The spelling of 19129260437401 in words is "nineteen trillion, one hundred twenty-nine billion, two hundred sixty million, four hundred thirty-seven thousand, four hundred one".