1656391054 has 8 divisors (see below), whose sum is σ = 2486329560. Its totient is φ = 827614536.

The previous prime is 1656391043. The next prime is 1656391067. The reversal of 1656391054 is 4501936561.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1656390998 and 1656391016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286924 + ... + 292639.

It is an arithmetic number, because the mean of its divisors is an integer number (310791195).

Almost surely, 2^1656391054 is an apocalyptic number.

1656391054 is a deficient number, since it is larger than the sum of its proper divisors (829938506).

1656391054 is a wasteful number, since it uses less digits than its factorization.

1656391054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580994.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 1656391054 is about 40698.7844290220. The cubic root of 1656391054 is about 1183.1894595342.

The spelling of 1656391054 in words is "one billion, six hundred fifty-six million, three hundred ninety-one thousand, fifty-four".