1356402451566 has 32 divisors (see below), whose sum is σ = 2932762066560. Its totient is φ = 416760922656.

The previous prime is 1356402451549. The next prime is 1356402451567. The reversal of 1356402451566 is 6651542046531.

It is a happy number.

It is a super-2 number, since 2×1356402451566² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356402451567) 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, 160783176 + ... + 160791611.

It is an arithmetic number, because the mean of its divisors is an integer number (91648814580).

Almost surely, 2^{1356402451566} is an apocalyptic number.

1356402451566 is an abundant number, since it is smaller than the sum of its proper divisors (1576359614994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1356402451566 is a wasteful number, since it uses less digits than its factorization.

1356402451566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321574848.

The product of its (nonzero) digits is 2592000, while the sum is 48.

The spelling of 1356402451566 in words is "one trillion, three hundred fifty-six billion, four hundred two million, four hundred fifty-one thousand, five hundred sixty-six".