861416377 has 16 divisors (see below), whose sum is σ = 915171840. Its totient is φ = 809407872.

The previous prime is 861416371. The next prime is 861416399. The reversal of 861416377 is 773614168.

It is a cyclic number.

It is not a de Polignac number, because 861416377 - 2⁷ = 861416249 is a prime.

It is a super-2 number, since 2×861416377² = 1484076349127612258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861416371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389208 + ... + 391414.

It is an arithmetic number, because the mean of its divisors is an integer number (57198240).

Almost surely, 2^861416377 is an apocalyptic number.

It is an amenable number.

861416377 is a deficient number, since it is larger than the sum of its proper divisors (53755463).

861416377 is a wasteful number, since it uses less digits than its factorization.

861416377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2592.

The product of its digits is 169344, while the sum is 43.

The square root of 861416377 is about 29349.8956897635. The cubic root of 861416377 is about 951.4903208420.

The spelling of 861416377 in words is "eight hundred sixty-one million, four hundred sixteen thousand, three hundred seventy-seven".