15400855478554 has 64 divisors (see below), whose sum is σ = 28484699894784. Its totient is φ = 6081434505216.

The previous prime is 15400855478527. The next prime is 15400855478557. The reversal of 15400855478554 is 45587455800451.

It is a junction number, because it is equal to n+sod(n) for n = 15400855478492 and 15400855478501.

It is not an unprimeable number, because it can be changed into a prime (15400855478557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 370254382 + ... + 370295974.

It is an arithmetic number, because the mean of its divisors is an integer number (445073435856).

Almost surely, 2^{15400855478554} is an apocalyptic number.

15400855478554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15400855478554 is a deficient number, since it is larger than the sum of its proper divisors (13083844416230).

15400855478554 is a wasteful number, since it uses less digits than its factorization.

15400855478554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45311.

The product of its (nonzero) digits is 89600000, while the sum is 61.

The spelling of 15400855478554 in words is "fifteen trillion, four hundred billion, eight hundred fifty-five million, four hundred seventy-eight thousand, five hundred fifty-four".