61642375 has 8 divisors (see below), whose sum is σ = 76929840. Its totient is φ = 49313800.

The previous prime is 61642351. The next prime is 61642381. The reversal of 61642375 is 57324616.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-61642375 is a prime.

It is a super-3 number, since 3×61642375³ (a number of 24 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61642375.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246445 + ... + 246694.

It is an arithmetic number, because the mean of its divisors is an integer number (9616230).

Almost surely, 2^61642375 is an apocalyptic number.

61642375 is a deficient number, since it is larger than the sum of its proper divisors (15287465).

61642375 is an equidigital number, since it uses as much as digits as its factorization.

61642375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493154 (or 493144 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The square root of 61642375 is about 7851.2658215093. The cubic root of 61642375 is about 395.0267033168.

The spelling of 61642375 in words is "sixty-one million, six hundred forty-two thousand, three hundred seventy-five".