61517340 has 48 divisors (see below), whose sum is σ = 191388960. Its totient is φ = 16404480.

The previous prime is 61517329. The next prime is 61517371. The reversal of 61517340 is 4371516.

61517340 is a `hidden beast` number, since 615 + 1 + 7 + 3 + 40 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56421 + ... + 57500.

It is an arithmetic number, because the mean of its divisors is an integer number (3987270).

Almost surely, 2^61517340 is an apocalyptic number.

61517340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61517340 is an abundant number, since it is smaller than the sum of its proper divisors (129871620).

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

61517340 is a wasteful number, since it uses less digits than its factorization.

61517340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113939 (or 113931 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 61517340 is about 7843.2990507821. The cubic root of 61517340 is about 394.7594326440.

Adding to 61517340 its reverse (4371516), we get a palindrome (65888856).

It can be divided in two parts, 615 and 17340, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 61517340 in words is "sixty-one million, five hundred seventeen thousand, three hundred forty".