356456440021 has 16 divisors (see below), whose sum is σ = 392505664320. Its totient is φ = 321015726720.

The previous prime is 356456439961. The next prime is 356456440027. The reversal of 356456440021 is 120044654653.

It is a cyclic number.

It is not a de Polignac number, because 356456440021 - 2¹⁵ = 356456407253 is a prime.

It is a super-2 number, since 2×356456440021² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (356456440027) 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, 6787761 + ... + 6840073.

It is an arithmetic number, because the mean of its divisors is an integer number (24531604020).

Almost surely, 2^356456440021 is an apocalyptic number.

It is an amenable number.

356456440021 is a deficient number, since it is larger than the sum of its proper divisors (36049224299).

356456440021 is a wasteful number, since it uses less digits than its factorization.

356456440021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58116.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 356456440021 in words is "three hundred fifty-six billion, four hundred fifty-six million, four hundred forty thousand, twenty-one".