1161404651 has 4 divisors (see below), whose sum is σ = 1266986904. Its totient is φ = 1055822400.

The previous prime is 1161404633. The next prime is 1161404653. The reversal of 1161404651 is 1564041611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1564041611 = 11 ⋅142185601.

It is a cyclic number.

It is not a de Polignac number, because 1161404651 - 2²² = 1157210347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161404653) 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, 52791110 + ... + 52791131.

It is an arithmetic number, because the mean of its divisors is an integer number (316746726).

Almost surely, 2^1161404651 is an apocalyptic number.

1161404651 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1161404651 is a deficient number, since it is larger than the sum of its proper divisors (105582253).

1161404651 is a wasteful number, since it uses less digits than its factorization.

1161404651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105582252.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1161404651 is about 34079.3874798242. The cubic root of 1161404651 is about 1051.1415101797.

The spelling of 1161404651 in words is "one billion, one hundred sixty-one million, four hundred four thousand, six hundred fifty-one".