12155553401 has 8 divisors (see below), whose sum is σ = 12871711944. Its totient is φ = 11439520000.

The previous prime is 12155553391. The next prime is 12155553407. The reversal of 12155553401 is 10435555121.

It can be written as a sum of positive squares in 4 ways, for example, as 7140081001 + 5015472400 = 84499^2 + 70820^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12155553401 - 2²² = 12151359097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155553407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232151 + ... + 279651.

It is an arithmetic number, because the mean of its divisors is an integer number (1608963993).

Almost surely, 2^12155553401 is an apocalyptic number.

It is an amenable number.

12155553401 is a deficient number, since it is larger than the sum of its proper divisors (716158543).

12155553401 is a wasteful number, since it uses less digits than its factorization.

12155553401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62571.

The product of its (nonzero) digits is 15000, while the sum is 32.

The spelling of 12155553401 in words is "twelve billion, one hundred fifty-five million, five hundred fifty-three thousand, four hundred one".