1213655100455 has 32 divisors (see below), whose sum is σ = 1693468796928. Its totient is φ = 817791033600.

The previous prime is 1213655100431. The next prime is 1213655100479. The reversal of 1213655100455 is 5540015563121.

It is an interprime number because it is at equal distance from previous prime (1213655100431) and next prime (1213655100479).

It is not a de Polignac number, because 1213655100455 - 2⁶ = 1213655100391 is a prime.

It is a super-2 number, since 2×1213655100455² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 184001 + ... + 1568810.

It is an arithmetic number, because the mean of its divisors is an integer number (52920899904).

Almost surely, 2^{1213655100455} is an apocalyptic number.

1213655100455 is a deficient number, since it is larger than the sum of its proper divisors (479813696473).

1213655100455 is a wasteful number, since it uses less digits than its factorization.

1213655100455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753167.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 1213655100455 in words is "one trillion, two hundred thirteen billion, six hundred fifty-five million, one hundred thousand, four hundred fifty-five".