613154640 has 240 divisors, whose sum is σ = 2341939392. Its totient is φ = 131862528.

The previous prime is 613154579. The next prime is 613154653. The reversal of 613154640 is 46451316.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×613154640² = 751917225107059200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 613154598 and 613154607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 198387 + ... + 201453.

Almost surely, 2^613154640 is an apocalyptic number.

613154640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 613154640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170969696).

613154640 is an abundant number, since it is smaller than the sum of its proper divisors (1728784752).

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

613154640 is a wasteful number, since it uses less digits than its factorization.

613154640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114 (or 3101 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 613154640 is about 24761.9595347380. The cubic root of 613154640 is about 849.5520777265.

The spelling of 613154640 in words is "six hundred thirteen million, one hundred fifty-four thousand, six hundred forty".