1554040556261 has 8 divisors (see below), whose sum is σ = 1637663059584. Its totient is φ = 1471756013200.

The previous prime is 1554040556231. The next prime is 1554040556267. The reversal of 1554040556261 is 1626550404551.

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 1554040556261 - 2³⁰ = 1552966814437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554040556267) 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, 334487681 + ... + 334492326.

It is an arithmetic number, because the mean of its divisors is an integer number (204707882448).

Almost surely, 2^{1554040556261} is an apocalyptic number.

It is an amenable number.

1554040556261 is a deficient number, since it is larger than the sum of its proper divisors (83622503323).

1554040556261 is a wasteful number, since it uses less digits than its factorization.

1554040556261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668980131.

The product of its (nonzero) digits is 720000, while the sum is 44.

The spelling of 1554040556261 in words is "one trillion, five hundred fifty-four billion, forty million, five hundred fifty-six thousand, two hundred sixty-one".