554400261 has 16 divisors (see below), whose sum is σ = 828606720. Its totient is φ = 366327360.

The previous prime is 554400251. The next prime is 554400283. The reversal of 554400261 is 162004455.

It is not a de Polignac number, because 554400261 - 2¹⁴ = 554383877 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (554400241) 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, 87805 + ... + 93906.

It is an arithmetic number, because the mean of its divisors is an integer number (51787920).

Almost surely, 2^554400261 is an apocalyptic number.

It is an amenable number.

554400261 is a deficient number, since it is larger than the sum of its proper divisors (274206459).

554400261 is a wasteful number, since it uses less digits than its factorization.

554400261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181833 (or 181827 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 554400261 is about 23545.7057868309. The cubic root of 554400261 is about 821.5004557100.

The spelling of 554400261 in words is "five hundred fifty-four million, four hundred thousand, two hundred sixty-one".