1554656521061 has 16 divisors (see below), whose sum is σ = 1790577833088. Its totient is φ = 1322195097600.

The previous prime is 1554656521057. The next prime is 1554656521069. The reversal of 1554656521061 is 1601256564551.

It is a cyclic number.

It is not a de Polignac number, because 1554656521061 - 2² = 1554656521057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1554656520997 and 1554656521015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1554656521069) 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, 6261461 + ... + 6505013.

It is an arithmetic number, because the mean of its divisors is an integer number (111911114568).

Almost surely, 2^{1554656521061} is an apocalyptic number.

It is an amenable number.

1554656521061 is a deficient number, since it is larger than the sum of its proper divisors (235921312027).

1554656521061 is a wasteful number, since it uses less digits than its factorization.

1554656521061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250652.

The product of its (nonzero) digits is 1080000, while the sum is 47.

The spelling of 1554656521061 in words is "one trillion, five hundred fifty-four billion, six hundred fifty-six million, five hundred twenty-one thousand, sixty-one".