1656974546 has 16 divisors (see below), whose sum is σ = 2503630080. Its totient is φ = 822441360.

The previous prime is 1656974503. The next prime is 1656974549. The reversal of 1656974546 is 6454796561.

It is a super-2 number, since 2×1656974546² = 5491129292183812232, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1656974549) 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, 491615 + ... + 494973.

It is an arithmetic number, because the mean of its divisors is an integer number (156476880).

Almost surely, 2^1656974546 is an apocalyptic number.

1656974546 is a deficient number, since it is larger than the sum of its proper divisors (846655534).

1656974546 is a wasteful number, since it uses less digits than its factorization.

1656974546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089.

The product of its digits is 5443200, while the sum is 53.

The square root of 1656974546 is about 40705.9522183181. The cubic root of 1656974546 is about 1183.3283761127.

The spelling of 1656974546 in words is "one billion, six hundred fifty-six million, nine hundred seventy-four thousand, five hundred forty-six".