61457155 has 16 divisors (see below), whose sum is σ = 75852000. Its totient is φ = 47773440.

The previous prime is 61457147. The next prime is 61457161. The reversal of 61457155 is 55175416.

It is not a de Polignac number, because 61457155 - 2³ = 61457147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61457155.

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, 71116 + ... + 71974.

It is an arithmetic number, because the mean of its divisors is an integer number (4740750).

Almost surely, 2^61457155 is an apocalyptic number.

61457155 is a deficient number, since it is larger than the sum of its proper divisors (14394845).

61457155 is a wasteful number, since it uses less digits than its factorization.

61457155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254.

The product of its digits is 21000, while the sum is 34.

The square root of 61457155 is about 7839.4613973155. The cubic root of 61457155 is about 394.6306540553.

The spelling of 61457155 in words is "sixty-one million, four hundred fifty-seven thousand, one hundred fifty-five".