157478354378454 has 32 divisors (see below), whose sum is σ = 325140518716416. Its totient is φ = 50795732259360.

The previous prime is 157478354378441. The next prime is 157478354378467. The reversal of 157478354378454 is 454873453874751.

It is an interprime number because it is at equal distance from previous prime (157478354378441) and next prime (157478354378467).

It is a super-2 number, since 2×157478354378454² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28604952 + ... + 33663035.

It is an arithmetic number, because the mean of its divisors is an integer number (10160641209888).

Almost surely, 2^{157478354378454} is an apocalyptic number.

157478354378454 is an abundant number, since it is smaller than the sum of its proper divisors (167662164337962).

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

157478354378454 is a wasteful number, since it uses less digits than its factorization.

157478354378454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62281620.

The product of its digits is 6322176000, while the sum is 75.

The spelling of 157478354378454 in words is "one hundred fifty-seven trillion, four hundred seventy-eight billion, three hundred fifty-four million, three hundred seventy-eight thousand, four hundred fifty-four".