61012555 has 8 divisors (see below), whose sum is σ = 73682352. Its totient is φ = 48498528.

The previous prime is 61012547. The next prime is 61012559. The reversal of 61012555 is 55521016.

61012555 = T₂₅₅ + T₂₅₆ + ... + T₇₂₅.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61012555 - 2³ = 61012547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61012559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38077 + ... + 39646.

It is an arithmetic number, because the mean of its divisors is an integer number (9210294).

Almost surely, 2^61012555 is an apocalyptic number.

61012555 is a deficient number, since it is larger than the sum of its proper divisors (12669797).

61012555 is a wasteful number, since it uses less digits than its factorization.

61012555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77885.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 61012555 is about 7811.0533860677. The cubic root of 61012555 is about 393.6767234096.

The spelling of 61012555 in words is "sixty-one million, twelve thousand, five hundred fifty-five".