1613431554 has 64 divisors (see below), whose sum is σ = 3855845376. Its totient is φ = 440060544.

The previous prime is 1613431553. The next prime is 1613431579. The reversal of 1613431554 is 4551343161.

It is a happy number.

It is a super-2 number, since 2×1613431554² = 5206322758885709832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1613431553) 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, 594669 + ... + 597375.

It is an arithmetic number, because the mean of its divisors is an integer number (60247584).

Almost surely, 2^1613431554 is an apocalyptic number.

1613431554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1613431554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1927922688).

1613431554 is an abundant number, since it is smaller than the sum of its proper divisors (2242413822).

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

1613431554 is a wasteful number, since it uses less digits than its factorization.

1613431554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its digits is 21600, while the sum is 33.

The square root of 1613431554 is about 40167.5435395295. The cubic root of 1613431554 is about 1172.8708214063.

The spelling of 1613431554 in words is "one billion, six hundred thirteen million, four hundred thirty-one thousand, five hundred fifty-four".