61267815 has 48 divisors (see below), whose sum is σ = 123222528. Its totient is φ = 27580608.

The previous prime is 61267793. The next prime is 61267831. The reversal of 61267815 is 51876216.

It is not a de Polignac number, because 61267815 - 2¹⁶ = 61202279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61267815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19654 + ... + 22556.

It is an arithmetic number, because the mean of its divisors is an integer number (2567136).

Almost surely, 2^61267815 is an apocalyptic number.

61267815 is an abundant number, since it is smaller than the sum of its proper divisors (61954713).

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

61267815 is a wasteful number, since it uses less digits than its factorization.

61267815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988 (or 2985 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 61267815 is about 7827.3759971015. The cubic root of 61267815 is about 394.2249717953.

The spelling of 61267815 in words is "sixty-one million, two hundred sixty-seven thousand, eight hundred fifteen".