11772400251 has 8 divisors (see below), whose sum is σ = 15697419280. Its totient is φ = 7847824032.

The previous prime is 11772400231. The next prime is 11772400271. The reversal of 11772400251 is 15200427711.

It is an interprime number because it is at equal distance from previous prime (11772400231) and next prime (11772400271).

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

It is not a de Polignac number, because 11772400251 - 2⁹ = 11772399739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11772400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42700 + ... + 159273.

It is an arithmetic number, because the mean of its divisors is an integer number (1962177410).

Almost surely, 2^11772400251 is an apocalyptic number.

11772400251 is a deficient number, since it is larger than the sum of its proper divisors (3925019029).

11772400251 is a wasteful number, since it uses less digits than its factorization.

11772400251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221405.

The product of its (nonzero) digits is 3920, while the sum is 30.

Adding to 11772400251 its reverse (15200427711), we get a palindrome (26972827962).

The spelling of 11772400251 in words is "eleven billion, seven hundred seventy-two million, four hundred thousand, two hundred fifty-one".