76769561 has 32 divisors (see below), whose sum is σ = 91929600. Its totient is φ = 63391680.

The previous prime is 76769549. The next prime is 76769573. The reversal of 76769561 is 16596767.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (76769549) and next prime (76769573).

It is not a de Polignac number, because 76769561 - 2²² = 72575257 is a prime.

It is a super-2 number, since 2×76769561² = 11787130992265442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76769591) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 552230 + ... + 552368.

It is an arithmetic number, because the mean of its divisors is an integer number (2872800).

Almost surely, 2^76769561 is an apocalyptic number.

It is an amenable number.

76769561 is a deficient number, since it is larger than the sum of its proper divisors (15160039).

76769561 is a wasteful number, since it uses less digits than its factorization.

76769561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269.

The product of its digits is 476280, while the sum is 47.

The square root of 76769561 is about 8761.8240680808. The cubic root of 76769561 is about 425.0072635437.

The spelling of 76769561 in words is "seventy-six million, seven hundred sixty-nine thousand, five hundred sixty-one".