1401555611 has 4 divisors (see below), whose sum is σ = 1413958872. Its totient is φ = 1389152352.

The previous prime is 1401555563. The next prime is 1401555629. The reversal of 1401555611 is 1165551041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1165551041 = 8933 ⋅130477.

It is a cyclic number.

It is not a de Polignac number, because 1401555611 - 2²² = 1397361307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1401555641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6201461 + ... + 6201686.

It is an arithmetic number, because the mean of its divisors is an integer number (353489718).

Almost surely, 2^1401555611 is an apocalyptic number.

1401555611 is a deficient number, since it is larger than the sum of its proper divisors (12403261).

1401555611 is a wasteful number, since it uses less digits than its factorization.

1401555611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12403260.

The product of its (nonzero) digits is 3000, while the sum is 29.

The square root of 1401555611 is about 37437.3558227608. The cubic root of 1401555611 is about 1119.1031327155.

The spelling of 1401555611 in words is "one billion, four hundred one million, five hundred fifty-five thousand, six hundred eleven".