78637053 has 24 divisors (see below), whose sum is σ = 122036544. Its totient is φ = 44851840.

The previous prime is 78637043. The next prime is 78637093. The reversal of 78637053 is 35073687.

Added to its reverse (35073687) it gives a triangular number (113710740 = T₁₅₀₈₀).

It is not a de Polignac number, because 78637053 - 2⁶ = 78636989 is a prime.

It is a super-2 number, since 2×78637053² = 12367572209049618, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78637043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201 + ... + 12542.

It is an arithmetic number, because the mean of its divisors is an integer number (5084856).

Almost surely, 2^78637053 is an apocalyptic number.

It is an amenable number.

78637053 is a deficient number, since it is larger than the sum of its proper divisors (43399491).

78637053 is a wasteful number, since it uses less digits than its factorization.

78637053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12785 (or 12774 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The square root of 78637053 is about 8867.7535486729. The cubic root of 78637053 is about 428.4259250980.

Adding to 78637053 its reverse (35073687), we get a triangular number (113710740 = T₁₅₀₈₀).

The spelling of 78637053 in words is "seventy-eight million, six hundred thirty-seven thousand, fifty-three".