61001155 has 16 divisors (see below), whose sum is σ = 74732544. Its totient is φ = 47789280.

The previous prime is 61001147. The next prime is 61001167. The reversal of 61001155 is 55110016.

It is not a de Polignac number, because 61001155 - 2³ = 61001147 is a prime.

It is a super-2 number, since 2×61001155² = 7442281822668050, which contains 22 as substring.

It is a Duffinian 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, 70254 + ... + 71116.

It is an arithmetic number, because the mean of its divisors is an integer number (4670784).

Almost surely, 2^61001155 is an apocalyptic number.

61001155 is a deficient number, since it is larger than the sum of its proper divisors (13731389).

61001155 is a wasteful number, since it uses less digits than its factorization.

61001155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 61001155 is about 7810.3236168548. The cubic root of 61001155 is about 393.6522028051.

The spelling of 61001155 in words is "sixty-one million, one thousand, one hundred fifty-five".